54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 2002, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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*
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* File cmemory.c ICU Heap allocation.
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* All ICU heap allocation, both for C and C++ new of ICU
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* class types, comes through these functions.
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*
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* If you have a need to replace ICU allocation, this is the
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* place to do it.
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*
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* Note that uprv_malloc(0) returns a non-NULL pointer, and
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* that a subsequent free of that pointer value is a NOP.
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*
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******************************************************************************
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*/
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#include "cmemory.h"
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/* uprv_malloc(0) returns a pointer to this read-only data. */
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static const int32_t zeroMem[] = {0, 0, 0, 0, 0, 0};
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U_CAPI void * U_EXPORT2
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uprv_malloc(size_t s) {
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if (s > 0) {
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return malloc(s);
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} else {
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return (void *)zeroMem;
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}
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}
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U_CAPI void * U_EXPORT2
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uprv_realloc(void * buffer, size_t size) {
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if (buffer == zeroMem) {
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return uprv_malloc(size);
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} else if (size == 0) {
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free(buffer);
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return (void *)zeroMem;
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} else {
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return realloc(buffer, size);
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}
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}
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U_CAPI void U_EXPORT2
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uprv_free(void *buffer) {
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if (buffer != zeroMem) {
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free(buffer);
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}
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}
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