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