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84 #include "PpContext.h"
86 // default alignment and chunksize, if called with 0 arguments
87 #define CHUNKSIZE (64*1024)
96 TPpContext::MemoryPool* TPpContext::mem_CreatePool(size_t chunksize, unsigned int align)
101 chunksize = CHUNKSIZE;
102 if (align & (align - 1))
104 if (chunksize < sizeof(MemoryPool))
106 if (chunksize & (align - 1))
109 MemoryPool *pool = (MemoryPool*)malloc(chunksize);
114 pool->chunksize = chunksize;
115 pool->alignmask = (uintptr_t)(align) - 1;
116 pool->free = ((uintptr_t)(pool + 1) + pool->alignmask) & ~pool->alignmask;
117 pool->end = (uintptr_t)pool + chunksize;
122 void TPpContext::mem_FreePool(MemoryPool *pool)
124 struct chunk *p, *next;
126 for (p = (struct chunk *)pool; p; p = next) {
132 void* TPpContext::mem_Alloc(MemoryPool *pool, size_t size)
135 void *rv = (void *)pool->free;
136 size = (size + pool->alignmask) & ~pool->alignmask;
137 if (size <= 0) size = pool->alignmask;
139 if (pool->free > pool->end || pool->free < (uintptr_t)rv) {
140 size_t minreq = (size + sizeof(struct chunk) + pool->alignmask) & ~pool->alignmask;
141 pool->free = (uintptr_t)rv;
142 if (minreq >= pool->chunksize) {
143 // request size is too big for the chunksize, so allocate it as
144 // a single chunk of the right size
145 ch = (struct chunk*)malloc(minreq);
148 ch = (struct chunk*)malloc(pool->chunksize);
150 pool->free = (uintptr_t)ch + minreq;
151 pool->end = (uintptr_t)ch + pool->chunksize;
153 ch->next = pool->next;
155 rv = (void *)(((uintptr_t)(ch+1) + pool->alignmask) & ~pool->alignmask);
160 } // end namespace glslang