29 lines
742 B
C
29 lines
742 B
C
#include "libc/errno.h"
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#include "libc/mem/mem.h"
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#include "libc/sysv/errfuns.h"
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#include "third_party/dlmalloc/dlmalloc.internal.h"
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int dlposix_memalign(void** pp, size_t alignment, size_t bytes) {
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void* mem;
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size_t d, r;
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mem = NULL;
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if (alignment == MALLOC_ALIGNMENT) {
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mem = dlmalloc(bytes);
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} else {
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d = alignment / sizeof(void*);
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r = alignment % sizeof(void*);
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if (r != 0 || d == 0 || (d & (d - SIZE_T_ONE)) != 0) {
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return einval();
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} else if (bytes <= MAX_REQUEST - alignment) {
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if (alignment < MIN_CHUNK_SIZE) alignment = MIN_CHUNK_SIZE;
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mem = dlmemalign$impl(g_dlmalloc, alignment, bytes);
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}
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}
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if (mem == 0) {
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return enomem();
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} else {
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*pp = mem;
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return 0;
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}
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}
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