diff options
author | Brian <[email protected]> | 2007-04-20 08:30:24 -0600 |
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committer | Brian <[email protected]> | 2007-04-21 10:05:05 -0600 |
commit | 82839e8430aa7f88357cad887ae2d804072de568 (patch) | |
tree | 97a3ab20730f47820aa9880ab3ec88c10c5681e2 /src/mesa/shader/slang | |
parent | ced6f76404ff1a6713c85edff17551f82c33cc24 (diff) |
Memory pool manager.
Instead of doing intricate malloc/free tracking during compiling, allocate
everything (which would be discarded after compiling) from a pool that can
be freed en masse when done.
Diffstat (limited to 'src/mesa/shader/slang')
-rw-r--r-- | src/mesa/shader/slang/slang_mem.c | 142 | ||||
-rw-r--r-- | src/mesa/shader/slang/slang_mem.h | 59 |
2 files changed, 201 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/slang_mem.c b/src/mesa/shader/slang/slang_mem.c new file mode 100644 index 00000000000..c7be9a7dc1a --- /dev/null +++ b/src/mesa/shader/slang/slang_mem.c @@ -0,0 +1,142 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5.3 + * + * Copyright (C) 2005-2007 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** + * \file slang_mem.c + * + * Memory manager for GLSL compiler. The general idea is to do all + * allocations out of a large pool then just free the pool when done + * compiling to avoid intricate malloc/free tracking and memory leaks. + * + * \author Brian Paul + */ + +#include "context.h" +#include "slang_mem.h" + +#define GRANULARITY 8 +#define ROUND_UP(B) ( ((B) + (GRANULARITY - 1)) & ~(GRANULARITY - 1) ) + + +slang_mempool * +_slang_new_mempool(GLuint initialSize) +{ + slang_mempool *pool = (slang_mempool *) _mesa_calloc(sizeof(slang_mempool)); + if (pool) { + pool->Data = (char *) _mesa_calloc(initialSize); + if (!pool->Data) { + _mesa_free(pool); + return NULL; + } + pool->Size = initialSize; + pool->Used = 0; + } + return pool; +} + + +void +_slang_delete_mempool(slang_mempool *pool) +{ + GLuint total = 0; + while (pool) { + slang_mempool *next = pool->Next; + total += pool->Used; + _mesa_free(pool->Data); + _mesa_free(pool); + pool = next; + } + printf("TOTAL USED %u\n", total); +} + + +/** + * Alloc 'bytes' from shader mempool. + */ +void * +_slang_alloc(GLuint bytes) +{ + slang_mempool *pool; + GET_CURRENT_CONTEXT(ctx); + + pool = (slang_mempool *) ctx->Shader.MemPool; + + while (pool) { + if (pool->Used + bytes <= pool->Size) { + /* found room */ + void *addr = (void *) (pool->Data + pool->Used); + pool->Used += ROUND_UP(bytes); + /*printf("alloc %u Used %u\n", bytes, pool->Used);*/ + return addr; + } + else if (pool->Next) { + /* try next block */ + pool = pool->Next; + } + else { + /* alloc new pool */ + assert(bytes <= pool->Size); /* XXX or max2() */ + pool->Next = _slang_new_mempool(pool->Size); + if (!pool->Next) { + /* we're _really_ out of memory */ + return NULL; + } + else { + pool->Used = ROUND_UP(bytes); + return (void *) pool->Data; + } + } + } + return NULL; +} + + +void * +_slang_realloc(void *oldBuffer, GLuint oldSize, GLuint newSize) +{ + const GLuint copySize = (oldSize < newSize) ? oldSize : newSize; + void *newBuffer = _slang_alloc(newSize); + if (newBuffer && oldBuffer && copySize > 0) + _mesa_memcpy(newBuffer, oldBuffer, copySize); + return newBuffer; +} + + +/** + * Clone string, storing in current mempool. + */ +char * +_slang_strdup(const char *s) +{ + if (s) { + size_t l = _mesa_strlen(s); + char *s2 = (char *) _slang_alloc(l + 1); + if (s2) + _mesa_strcpy(s2, s); + return s2; + } + else { + return NULL; + } +} diff --git a/src/mesa/shader/slang/slang_mem.h b/src/mesa/shader/slang/slang_mem.h new file mode 100644 index 00000000000..f44892666bf --- /dev/null +++ b/src/mesa/shader/slang/slang_mem.h @@ -0,0 +1,59 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5.3 + * + * Copyright (C) 2005-2007 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +#ifndef SLANG_MEM_H +#define SLANG_MEM_H + + +#include "imports.h" + + +typedef struct slang_mempool_ +{ + GLuint Size, Used; + char *Data; + struct slang_mempool_ *Next; +} slang_mempool; + + +extern slang_mempool * +_slang_new_mempool(GLuint initialSize); + +extern void +_slang_delete_mempool(slang_mempool *pool); + +extern void * +_slang_alloc(GLuint bytes); + +extern void * +_slang_realloc(void *oldBuffer, GLuint oldSize, GLuint newSize); + +extern char * +_slang_strdup(const char *s); + + +#define USE_MEMPOOL 1 /* XXX temporary */ + +#endif |