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annotate nspr/lib/ds/plarenas.h @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +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 #ifndef PLARENAS_H
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7 #define PLARENAS_H
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8
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9 PR_BEGIN_EXTERN_C
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10
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11 typedef struct PLArenaPool PLArenaPool;
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12
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13 /*
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14 ** Initialize an arena pool with the given name for debugging and metering,
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15 ** with a minimum gross size per arena of size bytes. The net size per arena
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16 ** is smaller than the gross size by a header of four pointers plus any
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17 ** necessary padding for alignment.
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18 **
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19 ** Note: choose a gross size that's a power of two to avoid the heap allocator
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20 ** rounding the size up.
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21 **/
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22 PR_EXTERN(void) PL_InitArenaPool(
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23 PLArenaPool *pool, const char *name, PRUint32 size, PRUint32 align);
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24
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25 /*
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26 ** Finish using arenas, freeing all memory associated with them.
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27 **/
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28 PR_EXTERN(void) PL_ArenaFinish(void);
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29
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30 /*
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31 ** Free the arenas in pool. The user may continue to allocate from pool
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32 ** after calling this function. There is no need to call PL_InitArenaPool()
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33 ** again unless PL_FinishArenaPool(pool) has been called.
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34 **/
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35 PR_EXTERN(void) PL_FreeArenaPool(PLArenaPool *pool);
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36
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37 /*
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38 ** Free the arenas in pool and finish using it altogether.
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39 **/
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40 PR_EXTERN(void) PL_FinishArenaPool(PLArenaPool *pool);
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41
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42 /*
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43 ** Compact all of the arenas in a pool so that no space is wasted.
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44 ** NOT IMPLEMENTED. Do not use.
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45 **/
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46 PR_EXTERN(void) PL_CompactArenaPool(PLArenaPool *pool);
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47
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48 /*
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49 ** Friend functions used by the PL_ARENA_*() macros.
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50 **
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51 ** WARNING: do not call these functions directly. Always use the
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52 ** PL_ARENA_*() macros.
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53 **/
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54 PR_EXTERN(void *) PL_ArenaAllocate(PLArenaPool *pool, PRUint32 nb);
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55
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56 PR_EXTERN(void *) PL_ArenaGrow(
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57 PLArenaPool *pool, void *p, PRUint32 size, PRUint32 incr);
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58
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59 PR_EXTERN(void) PL_ArenaRelease(PLArenaPool *pool, char *mark);
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60
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61 /*
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62 ** memset contents of all arenas in pool to pattern
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63 */
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64 PR_EXTERN(void) PL_ClearArenaPool(PLArenaPool *pool, PRInt32 pattern);
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65
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66 /*
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67 ** A function like malloc_size() or malloc_usable_size() that measures the
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68 ** size of a heap block.
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69 */
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70 typedef size_t (*PLMallocSizeFn)(const void *ptr);
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71
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72 /*
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73 ** Measure all memory used by a PLArenaPool, excluding the PLArenaPool
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74 ** structure.
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75 */
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76 PR_EXTERN(size_t) PL_SizeOfArenaPoolExcludingPool(
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77 const PLArenaPool *pool, PLMallocSizeFn mallocSizeOf);
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78
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79 PR_END_EXTERN_C
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80
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81 #endif /* PLARENAS_H */
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