forked from KolibriOS/kolibrios
985e4f70b5
git-svn-id: svn://kolibrios.org@3772 a494cfbc-eb01-0410-851d-a64ba20cac60
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (C) 1999-2005 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
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS 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 exemem.c
|
|
* Functions for allocating executable memory.
|
|
*
|
|
* \author Keith Whitwell
|
|
*/
|
|
|
|
|
|
#include "pipe/p_compiler.h"
|
|
#include "util/u_debug.h"
|
|
#include "os/os_thread.h"
|
|
#include "util/u_memory.h"
|
|
|
|
#include "rtasm_execmem.h"
|
|
|
|
#include "util/u_mm.h"
|
|
|
|
#define EXEC_HEAP_SIZE (4*1024*1024)
|
|
|
|
pipe_static_mutex(exec_mutex);
|
|
|
|
static struct mem_block *exec_heap = NULL;
|
|
static unsigned char *exec_mem = NULL;
|
|
|
|
|
|
static void
|
|
init_heap(void)
|
|
{
|
|
if (!exec_heap)
|
|
exec_heap = u_mmInit( 0, EXEC_HEAP_SIZE );
|
|
|
|
if (!exec_mem)
|
|
exec_mem = (unsigned char *) user_alloc(EXEC_HEAP_SIZE);
|
|
}
|
|
|
|
|
|
void *
|
|
rtasm_exec_malloc(size_t size)
|
|
{
|
|
struct mem_block *block = NULL;
|
|
void *addr = NULL;
|
|
|
|
pipe_mutex_lock(exec_mutex);
|
|
|
|
init_heap();
|
|
|
|
if (exec_heap) {
|
|
size = (size + 31) & ~31; /* next multiple of 32 bytes */
|
|
block = u_mmAllocMem( exec_heap, size, 5, 0 ); /* 5 -> 32-byte alignment */
|
|
}
|
|
|
|
if (block)
|
|
addr = exec_mem + block->ofs;
|
|
else
|
|
debug_printf("rtasm_exec_malloc failed\n");
|
|
|
|
pipe_mutex_unlock(exec_mutex);
|
|
|
|
return addr;
|
|
}
|
|
|
|
|
|
void
|
|
rtasm_exec_free(void *addr)
|
|
{
|
|
pipe_mutex_lock(exec_mutex);
|
|
|
|
if (exec_heap) {
|
|
struct mem_block *block = u_mmFindBlock(exec_heap, (unsigned char *)addr - exec_mem);
|
|
|
|
if (block)
|
|
u_mmFreeMem(block);
|
|
}
|
|
|
|
pipe_mutex_unlock(exec_mutex);
|
|
}
|
|
|