49 lines
957 B
C
49 lines
957 B
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <threads.h>
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#include <unistd.h>
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#include "alloc-util.h"
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#include "memory-util.h"
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size_t page_size(void) {
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static thread_local size_t pgsz = 0;
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long r;
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if (_likely_(pgsz > 0))
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return pgsz;
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r = sysconf(_SC_PAGESIZE);
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assert(r > 0);
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pgsz = (size_t) r;
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return pgsz;
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}
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void* memdup_reverse(const void *mem, size_t size) {
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assert(mem);
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assert(size != 0);
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void *p = malloc(size);
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if (!p)
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return NULL;
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uint8_t *p_dst = p;
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const uint8_t *p_src = mem;
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for (size_t i = 0, k = size; i < size; i++, k--)
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p_dst[i] = p_src[k-1];
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return p;
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}
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void* erase_and_free(void *p) {
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size_t l;
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if (!p)
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return NULL;
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l = MALLOC_SIZEOF_SAFE(p);
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explicit_bzero_safe(p, l);
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return mfree(p);
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}
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