84 lines
1.3 KiB
C
84 lines
1.3 KiB
C
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#include "imports.h"
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#include "glthread.h"
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#ifdef __linux__
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#include <unistd.h>
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#include <sys/mman.h>
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#include <mm.h>
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#define EXEC_HEAP_SIZE (128*1024)
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_glthread_DECLARE_STATIC_MUTEX(exec_mutex);
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static memHeap_t *exec_heap = NULL;
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static unsigned char *exec_mem = NULL;
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static void init_heap( void )
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{
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if (!exec_heap)
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exec_heap = mmInit( 0, EXEC_HEAP_SIZE );
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if (!exec_mem)
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exec_mem = (unsigned char *) mmap(0, EXEC_HEAP_SIZE,
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PROT_EXEC | PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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void *
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_mesa_exec_malloc( GLuint size )
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{
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PMemBlock block = NULL;
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void *addr = NULL;
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_glthread_LOCK_MUTEX(exec_mutex);
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init_heap();
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if (exec_heap) {
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size = (size + 31) & ~31;
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block = mmAllocMem( exec_heap, size, 32, 0 );
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}
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if (block)
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addr = exec_mem + block->ofs;
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_glthread_UNLOCK_MUTEX(exec_mutex);
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return addr;
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}
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void
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_mesa_exec_free(void *addr)
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{
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_glthread_LOCK_MUTEX(exec_mutex);
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if (exec_heap) {
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PMemBlock block = mmFindBlock(exec_heap, (unsigned char *)addr - exec_mem);
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if (block)
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mmFreeMem(block);
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}
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_glthread_UNLOCK_MUTEX(exec_mutex);
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}
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#else
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void *
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_mesa_exec_malloc( GLuint size )
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{
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return _mesa_malloc( size );
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}
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void
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_mesa_exec_free(void *addr)
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{
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_mesa_free(addr);
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}
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#endif
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