mirror of
https://github.com/libretro/RetroArch.git
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107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
#include <errno.h>
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#include <reent.h>
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#include "../../defines/psp_defines.h"
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#include <psp2/kernel/sysmem.h>
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#include <psp2/kernel/threadmgr.h>
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#define RAM_THRESHOLD 0xA00000 // Memory left to the system for threads and other internal stuffs
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static int _newlib_heap_memblock;
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static unsigned _newlib_heap_size;
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char *_newlib_heap_base, *_newlib_heap_end, *_newlib_heap_cur;
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static char _newlib_sbrk_mutex[32] __attribute__ ((aligned (8)));
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static int _newlib_vm_memblock;
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extern int _newlib_heap_size_user __attribute__((weak));
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extern int _newlib_vm_size_user __attribute__((weak));
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void * _sbrk_r(struct _reent *reent, ptrdiff_t incr) {
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if (sceKernelLockLwMutex((struct SceKernelLwMutexWork*)_newlib_sbrk_mutex, 1, 0) < 0)
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goto fail;
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if (!_newlib_heap_base || _newlib_heap_cur + incr >= _newlib_heap_end) {
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sceKernelUnlockLwMutex((struct SceKernelLwMutexWork*)_newlib_sbrk_mutex, 1);
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fail:
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reent->_errno = ENOMEM;
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return (void*)-1;
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}
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char *prev_heap_end = _newlib_heap_cur;
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_newlib_heap_cur += incr;
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sceKernelUnlockLwMutex((struct SceKernelLwMutexWork*)_newlib_sbrk_mutex, 1);
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return (void*) prev_heap_end;
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}
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void _init_vita_heap(void) {
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int _newlib_vm_size = 0;
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if (&_newlib_vm_size_user != NULL) {
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_newlib_vm_size = _newlib_vm_size_user;
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_newlib_vm_memblock = sceKernelAllocMemBlockForVM("code", _newlib_vm_size_user);
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if (_newlib_vm_memblock < 0){
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//sceClibPrintf("sceKernelAllocMemBlockForVM failed\n");
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goto failure;
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}
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}else{
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_newlib_vm_memblock = 0;
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}
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// Create a mutex to use inside _sbrk_r
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if (sceKernelCreateLwMutex((struct SceKernelLwMutexWork*)_newlib_sbrk_mutex, "sbrk mutex", 0, 0, 0) < 0) {
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goto failure;
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}
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// Always allocating the max avaliable USER_RW mem on the system
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SceKernelFreeMemorySizeInfo info;
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info.size = sizeof(SceKernelFreeMemorySizeInfo);
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sceKernelGetFreeMemorySize(&info);
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if (&_newlib_heap_size_user != NULL) {
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_newlib_heap_size = _newlib_heap_size_user;
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}else{
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_newlib_heap_size = info.size_user - RAM_THRESHOLD;
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}
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_newlib_heap_size -= _newlib_vm_size;
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_newlib_heap_memblock = sceKernelAllocMemBlock("Newlib heap", 0x0c20d060, _newlib_heap_size, 0);
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if (_newlib_heap_memblock < 0) {
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goto failure;
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}
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if (sceKernelGetMemBlockBase(_newlib_heap_memblock, (void**)&_newlib_heap_base) < 0) {
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goto failure;
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}
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_newlib_heap_end = _newlib_heap_base + _newlib_heap_size;
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_newlib_heap_cur = _newlib_heap_base;
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return;
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failure:
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_newlib_vm_memblock = 0;
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_newlib_heap_memblock = 0;
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_newlib_heap_base = 0;
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_newlib_heap_cur = 0;
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}
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int getVMBlock(){
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return _newlib_vm_memblock;
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}
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void _free_vita_heap(void) {
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// Destroy the sbrk mutex
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sceKernelDeleteLwMutex((struct SceKernelLwMutexWork*)_newlib_sbrk_mutex);
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// Free the heap memblock to avoid memory leakage.
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sceKernelFreeMemBlock(_newlib_heap_memblock);
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if(_newlib_vm_memblock)
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sceKernelFreeMemBlock(_newlib_vm_memblock);
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_newlib_vm_memblock = 0;
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_newlib_heap_memblock = 0;
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_newlib_heap_base = 0;
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_newlib_heap_cur = 0;
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}
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