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https://github.com/wiiu-env/wut.git
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d5effaaf88
Move files to mem*heap.h. Use MEMHeapHandle everywhere to reduce need for unecessary casts. Rename types to match the function names better (e.g. Frame -> Frm).
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
#include "wut_newlib.h"
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#include <coreinit/atomic.h>
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#include <coreinit/memheap.h>
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#include <coreinit/memexpheap.h>
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static uint8_t *sHeapBase = NULL;
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static uint32_t sHeapMaxSize = 0;
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static volatile uint32_t sHeapSize = 0;
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void *
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__wut_sbrk_r(struct _reent *r,
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ptrdiff_t incr)
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{
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uint32_t oldSize, newSize;
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do {
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oldSize = sHeapSize;
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newSize = oldSize + incr;
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if (newSize > sHeapMaxSize) {
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r->_errno = ENOMEM;
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return (void *)-1;
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}
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} while (!OSCompareAndSwapAtomic(&sHeapSize, oldSize, newSize));
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return sHeapBase + oldSize;
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}
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void
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__init_wut_sbrk_heap()
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{
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MEMHeapHandle heap = MEMGetBaseHeapHandle(MEM_BASE_HEAP_MEM2);
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uint32_t freeSize = MEMGetAllocatableSizeForExpHeapEx(heap, 0x1000);
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sHeapMaxSize = (uint32_t)(0.9f * (float)freeSize) & ~0xFFF;
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sHeapBase = (uint8_t *)MEMAllocFromExpHeapEx(heap, sHeapMaxSize, 0x1000);
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sHeapSize = 0;
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}
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void
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__fini_wut_sbrk_heap()
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{
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MEMHeapHandle heap = MEMGetBaseHeapHandle(MEM_BASE_HEAP_MEM2);
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MEMFreeToExpHeap(heap, sHeapBase);
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}
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