Mercurial > trustbridge > nss-cmake-static

annotate nspr/lib/ds/plarena.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 /*
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7 * Lifetime-based fast allocation, inspired by much prior art, including
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8 * "Fast Allocation and Deallocation of Memory Based on Object Lifetimes"
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9 * David R. Hanson, Software -- Practice and Experience, Vol. 20(1).
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10 */
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include "plarena.h"
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14 #include "prmem.h"
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15 #include "prbit.h"
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16 #include "prlog.h"
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17 #include "prlock.h"
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18 #include "prinit.h"
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19
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20 static PLArena *arena_freelist;
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21
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22 #ifdef PL_ARENAMETER
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23 static PLArenaStats *arena_stats_list;
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24
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25 #define COUNT(pool,what) (pool)->stats.what++
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26 #else
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27 #define COUNT(pool,what) /* nothing */
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28 #endif
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29
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30 #define PL_ARENA_DEFAULT_ALIGN sizeof(double)
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31
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32 static PRLock *arenaLock;
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33 static PRCallOnceType once;
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34 static const PRCallOnceType pristineCallOnce;
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35
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36 /*
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37 ** InitializeArenas() -- Initialize arena operations.
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38 **
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39 ** InitializeArenas() is called exactly once and only once from
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40 ** LockArena(). This function creates the arena protection
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41 ** lock: arenaLock.
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42 **
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43 ** Note: If the arenaLock cannot be created, InitializeArenas()
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44 ** fails quietly, returning only PR_FAILURE. This percolates up
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45 ** to the application using the Arena API. He gets no arena
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46 ** from PL_ArenaAllocate(). It's up to him to fail gracefully
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47 ** or recover.
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48 **
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49 */
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50 static PRStatus InitializeArenas( void )
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51 {
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52 PR_ASSERT( arenaLock == NULL );
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53 arenaLock = PR_NewLock();
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54 if ( arenaLock == NULL )
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55 return PR_FAILURE;
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56 else
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57 return PR_SUCCESS;
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58 } /* end ArenaInitialize() */
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59
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60 static PRStatus LockArena( void )
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61 {
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62 PRStatus rc = PR_CallOnce( &once, InitializeArenas );
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63
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64 if ( PR_FAILURE != rc )
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65 PR_Lock( arenaLock );
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66 return(rc);
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67 } /* end LockArena() */
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68
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69 static void UnlockArena( void )
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70 {
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71 PR_Unlock( arenaLock );
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72 return;
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73 } /* end UnlockArena() */
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74
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75 PR_IMPLEMENT(void) PL_InitArenaPool(
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76 PLArenaPool *pool, const char *name, PRUint32 size, PRUint32 align)
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77 {
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78 /*
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79 * Look-up table of PR_BITMASK(PR_CeilingLog2(align)) values for
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80 * align = 1 to 32.
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81 */
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82 static const PRUint8 pmasks[33] = {
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83 0, /* not used */
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84 0, 1, 3, 3, 7, 7, 7, 7,15,15,15,15,15,15,15,15, /* 1 ... 16 */
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85 31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31}; /* 17 ... 32 */
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86
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87 if (align == 0)
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88 align = PL_ARENA_DEFAULT_ALIGN;
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89
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90 if (align < sizeof(pmasks)/sizeof(pmasks[0]))
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91 pool->mask = pmasks[align];
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92 else
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93 pool->mask = PR_BITMASK(PR_CeilingLog2(align));
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94
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95 pool->first.next = NULL;
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96 pool->first.base = pool->first.avail = pool->first.limit =
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97 (PRUword)PL_ARENA_ALIGN(pool, &pool->first + 1);
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98 pool->current = &pool->first;
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99 /*
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100 * Compute the net size so that each arena's gross size is |size|.
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101 * sizeof(PLArena) + pool->mask is the header and alignment slop
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102 * that PL_ArenaAllocate adds to the net size.
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103 */
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104 if (size > sizeof(PLArena) + pool->mask)
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105 pool->arenasize = size - (sizeof(PLArena) + pool->mask);
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106 else
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107 pool->arenasize = size;
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108 #ifdef PL_ARENAMETER
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109 memset(&pool->stats, 0, sizeof pool->stats);
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110 pool->stats.name = strdup(name);
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111 pool->stats.next = arena_stats_list;
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112 arena_stats_list = &pool->stats;
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113 #endif
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114 }
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115
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116
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117 /*
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118 ** PL_ArenaAllocate() -- allocate space from an arena pool
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119 **
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120 ** Description: PL_ArenaAllocate() allocates space from an arena
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121 ** pool.
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122 **
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123 ** First, try to satisfy the request from arenas starting at
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124 ** pool->current.
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125 **
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126 ** If there is not enough space in the arena pool->current, try
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127 ** to claim an arena, on a first fit basis, from the global
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128 ** freelist (arena_freelist).
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129 **
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130 ** If no arena in arena_freelist is suitable, then try to
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131 ** allocate a new arena from the heap.
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132 **
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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133 ** Returns: pointer to allocated space or NULL
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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134 **
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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135 ** Notes: The original implementation had some difficult to
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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136 ** solve bugs; the code was difficult to read. Sometimes it's
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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parents:
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137 ** just easier to rewrite it. I did that. larryh.
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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138 **
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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parents:
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139 ** See also: bugzilla: 45343.
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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parents:
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140 **
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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141 */
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142
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143 PR_IMPLEMENT(void *) PL_ArenaAllocate(PLArenaPool *pool, PRUint32 nb)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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144 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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145 PLArena *a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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146 char *rp; /* returned pointer */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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147
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148 PR_ASSERT((nb & pool->mask) == 0);
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149
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150 nb = (PRUword)PL_ARENA_ALIGN(pool, nb); /* force alignment */
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151
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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152 /* attempt to allocate from arenas at pool->current */
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153 {
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154 a = pool->current;
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155 do {
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156 if ( nb <= a->limit - a->avail ) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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157 pool->current = a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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158 rp = (char *)a->avail;
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159 a->avail += nb;
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160 return rp;
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161 }
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162 } while( NULL != (a = a->next) );
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163 }
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164
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165 /* attempt to allocate from arena_freelist */
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166 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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167 PLArena *p; /* previous pointer, for unlinking from freelist */
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168
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169 /* lock the arena_freelist. Make access to the freelist MT-Safe */
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170 if ( PR_FAILURE == LockArena())
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171 return(0);
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172
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173 for ( a = arena_freelist, p = NULL; a != NULL ; p = a, a = a->next ) {
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174 if ( nb <= a->limit - a->base ) {
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175 if ( p == NULL )
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176 arena_freelist = a->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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177 else
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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178 p->next = a->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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179 UnlockArena();
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180 a->avail = a->base;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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181 rp = (char *)a->avail;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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182 a->avail += nb;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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183 /* the newly allocated arena is linked after pool->current
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
184 * and becomes pool->current */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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185 a->next = pool->current->next;
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186 pool->current->next = a;
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187 pool->current = a;
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188 if ( NULL == pool->first.next )
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189 pool->first.next = a;
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190 return(rp);
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191 }
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192 }
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193 UnlockArena();
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194 }
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195
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196 /* attempt to allocate from the heap */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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197 {
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198 PRUint32 sz = PR_MAX(pool->arenasize, nb);
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199 if (PR_UINT32_MAX - sz < sizeof *a + pool->mask) {
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200 a = NULL;
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201 } else {
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202 sz += sizeof *a + pool->mask; /* header and alignment slop */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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203 a = (PLArena*)PR_MALLOC(sz);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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204 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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205 if ( NULL != a ) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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206 a->limit = (PRUword)a + sz;
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207 a->base = a->avail = (PRUword)PL_ARENA_ALIGN(pool, a + 1);
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208 PL_MAKE_MEM_NOACCESS((void*)a->avail, a->limit - a->avail);
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209 rp = (char *)a->avail;
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210 a->avail += nb;
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211 /* the newly allocated arena is linked after pool->current
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212 * and becomes pool->current */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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213 a->next = pool->current->next;
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214 pool->current->next = a;
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215 pool->current = a;
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216 if ( NULL == pool->first.next )
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217 pool->first.next = a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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218 PL_COUNT_ARENA(pool,++);
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219 COUNT(pool, nmallocs);
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220 return(rp);
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221 }
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222 }
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223
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224 /* we got to here, and there's no memory to allocate */
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225 return(NULL);
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226 } /* --- end PL_ArenaAllocate() --- */
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227
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228 PR_IMPLEMENT(void *) PL_ArenaGrow(
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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229 PLArenaPool *pool, void *p, PRUint32 size, PRUint32 incr)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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230 {
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231 void *newp;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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232
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233 PL_ARENA_ALLOCATE(newp, pool, size + incr);
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234 if (newp)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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diff changeset
235 memcpy(newp, p, size);
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236 return newp;
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237 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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238
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diff changeset
239 static void ClearArenaList(PLArena *a, PRInt32 pattern)
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240 {
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diff changeset
241
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
242 for (; a; a = a->next) {
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diff changeset
243 PR_ASSERT(a->base <= a->avail && a->avail <= a->limit);
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244 a->avail = a->base;
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
245 PL_CLEAR_UNUSED_PATTERN(a, pattern);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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246 PL_MAKE_MEM_NOACCESS((void*)a->avail, a->limit - a->avail);
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247 }
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248 }
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diff changeset
249
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diff changeset
250 PR_IMPLEMENT(void) PL_ClearArenaPool(PLArenaPool *pool, PRInt32 pattern)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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diff changeset
251 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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diff changeset
252 ClearArenaList(pool->first.next, pattern);
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253 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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parents:
diff changeset
254
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
255 /*
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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parents:
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256 * Free tail arenas linked after head, which may not be the true list head.
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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257 * Reset pool->current to point to head in case it pointed at a tail arena.
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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diff changeset
258 */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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259 static void FreeArenaList(PLArenaPool *pool, PLArena *head, PRBool reallyFree)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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260 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
261 PLArena **ap, *a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
262
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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diff changeset
263 ap = &head->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
264 a = *ap;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
265 if (!a)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
266 return;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
267
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
268 #ifdef DEBUG
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
269 ClearArenaList(a, PL_FREE_PATTERN);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
270 #endif
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
271
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
272 if (reallyFree) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
273 do {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
274 *ap = a->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
275 PL_CLEAR_ARENA(a);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
276 PL_COUNT_ARENA(pool,--);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
277 PR_DELETE(a);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
278 } while ((a = *ap) != 0);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
279 } else {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
280 /* Insert the whole arena chain at the front of the freelist. */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
281 do {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
282 PL_MAKE_MEM_NOACCESS((void*)(*ap)->base,
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
283 (*ap)->limit - (*ap)->base);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
284 ap = &(*ap)->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
285 } while (*ap);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
286 LockArena();
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
287 *ap = arena_freelist;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
288 arena_freelist = a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
289 head->next = 0;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
290 UnlockArena();
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
291 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
292
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
293 pool->current = head;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
294 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
295
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
296 PR_IMPLEMENT(void) PL_ArenaRelease(PLArenaPool *pool, char *mark)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
297 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
298 PLArena *a;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
299
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
300 for (a = &pool->first; a; a = a->next) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
301 if (PR_UPTRDIFF(mark, a->base) <= PR_UPTRDIFF(a->avail, a->base)) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
302 a->avail = (PRUword)PL_ARENA_ALIGN(pool, mark);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
303 FreeArenaList(pool, a, PR_FALSE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
304 return;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
305 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
306 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
307 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
308
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
309 PR_IMPLEMENT(void) PL_FreeArenaPool(PLArenaPool *pool)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
310 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
311 FreeArenaList(pool, &pool->first, PR_FALSE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
312 COUNT(pool, ndeallocs);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
313 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
314
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
315 PR_IMPLEMENT(void) PL_FinishArenaPool(PLArenaPool *pool)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
316 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
317 FreeArenaList(pool, &pool->first, PR_TRUE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
318 #ifdef PL_ARENAMETER
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
319 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
320 PLArenaStats *stats, **statsp;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
321
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
322 if (pool->stats.name)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
323 PR_DELETE(pool->stats.name);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
324 for (statsp = &arena_stats_list; (stats = *statsp) != 0;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
325 statsp = &stats->next) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
326 if (stats == &pool->stats) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
327 *statsp = stats->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
328 return;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
329 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
330 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
331 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
332 #endif
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
333 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
334
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
335 PR_IMPLEMENT(void) PL_CompactArenaPool(PLArenaPool *ap)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
336 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
337 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
338
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
339 PR_IMPLEMENT(void) PL_ArenaFinish(void)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
340 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
341 PLArena *a, *next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
342
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
343 for (a = arena_freelist; a; a = next) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
344 next = a->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
345 PR_DELETE(a);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
346 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
347 arena_freelist = NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
348
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
349 if (arenaLock) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
350 PR_DestroyLock(arenaLock);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
351 arenaLock = NULL;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
352 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
353 once = pristineCallOnce;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
354 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
355
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
356 PR_IMPLEMENT(size_t) PL_SizeOfArenaPoolExcludingPool(
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
357 const PLArenaPool *pool, PLMallocSizeFn mallocSizeOf)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
358 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
359 /*
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
360 * The first PLArena is within |pool|, so don't measure it. Subsequent
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
361 * PLArenas are separate and must be measured.
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
362 */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
363 size_t size = 0;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
364 const PLArena *arena = pool->first.next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
365 while (arena) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
366 size += mallocSizeOf(arena);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
367 arena = arena->next;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
368 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
369 return size;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
370 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
371
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
372 #ifdef PL_ARENAMETER
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
373 PR_IMPLEMENT(void) PL_ArenaCountAllocation(PLArenaPool *pool, PRUint32 nb)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
374 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
375 pool->stats.nallocs++;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
376 pool->stats.nbytes += nb;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
377 if (nb > pool->stats.maxalloc)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
378 pool->stats.maxalloc = nb;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
379 pool->stats.variance += nb * nb;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
380 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
381
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
382 PR_IMPLEMENT(void) PL_ArenaCountInplaceGrowth(
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
383 PLArenaPool *pool, PRUint32 size, PRUint32 incr)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
384 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
385 pool->stats.ninplace++;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
386 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
387
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
388 PR_IMPLEMENT(void) PL_ArenaCountGrowth(
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
389 PLArenaPool *pool, PRUint32 size, PRUint32 incr)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
390 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
391 pool->stats.ngrows++;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
392 pool->stats.nbytes += incr;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
393 pool->stats.variance -= size * size;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
394 size += incr;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
395 if (size > pool->stats.maxalloc)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
396 pool->stats.maxalloc = size;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
397 pool->stats.variance += size * size;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
398 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
399
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
400 PR_IMPLEMENT(void) PL_ArenaCountRelease(PLArenaPool *pool, char *mark)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
401 {
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Andre Heinecke <andre.heinecke@intevation.de>
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402 pool->stats.nreleases++;
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403 }
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404
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Andre Heinecke <andre.heinecke@intevation.de>
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405 PR_IMPLEMENT(void) PL_ArenaCountRetract(PLArenaPool *pool, char *mark)
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406 {
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Andre Heinecke <andre.heinecke@intevation.de>
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407 pool->stats.nfastrels++;
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Andre Heinecke <andre.heinecke@intevation.de>
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408 }
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Andre Heinecke <andre.heinecke@intevation.de>
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409
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Andre Heinecke <andre.heinecke@intevation.de>
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410 #include <math.h>
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411 #include <stdio.h>
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412
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413 PR_IMPLEMENT(void) PL_DumpArenaStats(FILE *fp)
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414 {
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Andre Heinecke <andre.heinecke@intevation.de>
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415 PLArenaStats *stats;
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Andre Heinecke <andre.heinecke@intevation.de>
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416 double mean, variance;
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417
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418 for (stats = arena_stats_list; stats; stats = stats->next) {
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419 if (stats->nallocs != 0) {
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420 mean = (double)stats->nbytes / stats->nallocs;
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421 variance = fabs(stats->variance / stats->nallocs - mean * mean);
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422 } else {
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Andre Heinecke <andre.heinecke@intevation.de>
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423 mean = variance = 0;
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Andre Heinecke <andre.heinecke@intevation.de>
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424 }
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Andre Heinecke <andre.heinecke@intevation.de>
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425
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426 fprintf(fp, "\n%s allocation statistics:\n", stats->name);
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Andre Heinecke <andre.heinecke@intevation.de>
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427 fprintf(fp, " number of arenas: %u\n", stats->narenas);
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428 fprintf(fp, " number of allocations: %u\n", stats->nallocs);
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429 fprintf(fp, " number of free arena reclaims: %u\n", stats->nreclaims);
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430 fprintf(fp, " number of malloc calls: %u\n", stats->nmallocs);
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431 fprintf(fp, " number of deallocations: %u\n", stats->ndeallocs);
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432 fprintf(fp, " number of allocation growths: %u\n", stats->ngrows);
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433 fprintf(fp, " number of in-place growths: %u\n", stats->ninplace);
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434 fprintf(fp, "number of released allocations: %u\n", stats->nreleases);
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435 fprintf(fp, " number of fast releases: %u\n", stats->nfastrels);
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436 fprintf(fp, " total bytes allocated: %u\n", stats->nbytes);
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437 fprintf(fp, " mean allocation size: %g\n", mean);
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438 fprintf(fp, " standard deviation: %g\n", sqrt(variance));
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439 fprintf(fp, " maximum allocation size: %u\n", stats->maxalloc);
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440 }
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441 }
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Andre Heinecke <andre.heinecke@intevation.de>
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442 #endif /* PL_ARENAMETER */
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