139 lines
3.5 KiB
C++
139 lines
3.5 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* Copyright (C) 2002-2015, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*
|
|
******************************************************************************
|
|
*
|
|
* File cmemory.c ICU Heap allocation.
|
|
* All ICU heap allocation, both for C and C++ new of ICU
|
|
* class types, comes through these functions.
|
|
*
|
|
* If you have a need to replace ICU allocation, this is the
|
|
* place to do it.
|
|
*
|
|
* Note that uprv_malloc(0) returns a non-nullptr pointer,
|
|
* and that a subsequent free of that pointer value is a NOP.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
#include "unicode/uclean.h"
|
|
#include "cmemory.h"
|
|
#include "putilimp.h"
|
|
#include "uassert.h"
|
|
#include <stdlib.h>
|
|
|
|
/* uprv_malloc(0) returns a pointer to this read-only data. */
|
|
static const int32_t zeroMem[] = {0, 0, 0, 0, 0, 0};
|
|
|
|
/* Function Pointers for user-supplied heap functions */
|
|
static const void *pContext;
|
|
static UMemAllocFn *pAlloc;
|
|
static UMemReallocFn *pRealloc;
|
|
static UMemFreeFn *pFree;
|
|
|
|
#if U_DEBUG && defined(UPRV_MALLOC_COUNT)
|
|
#include <stdio.h>
|
|
static int n=0;
|
|
static long b=0;
|
|
#endif
|
|
|
|
U_CAPI void * U_EXPORT2
|
|
uprv_malloc(size_t s) {
|
|
#if U_DEBUG && defined(UPRV_MALLOC_COUNT)
|
|
#if 1
|
|
putchar('>');
|
|
fflush(stdout);
|
|
#else
|
|
fprintf(stderr,"MALLOC\t#%d\t%ul bytes\t%ul total\n", ++n,s,(b+=s)); fflush(stderr);
|
|
#endif
|
|
#endif
|
|
if (s > 0) {
|
|
if (pAlloc) {
|
|
return (*pAlloc)(pContext, s);
|
|
} else {
|
|
return uprv_default_malloc(s);
|
|
}
|
|
} else {
|
|
return (void *)zeroMem;
|
|
}
|
|
}
|
|
|
|
U_CAPI void * U_EXPORT2
|
|
uprv_realloc(void * buffer, size_t size) {
|
|
#if U_DEBUG && defined(UPRV_MALLOC_COUNT)
|
|
putchar('~');
|
|
fflush(stdout);
|
|
#endif
|
|
if (buffer == zeroMem) {
|
|
return uprv_malloc(size);
|
|
} else if (size == 0) {
|
|
if (pFree) {
|
|
(*pFree)(pContext, buffer);
|
|
} else {
|
|
uprv_default_free(buffer);
|
|
}
|
|
return (void *)zeroMem;
|
|
} else {
|
|
if (pRealloc) {
|
|
return (*pRealloc)(pContext, buffer, size);
|
|
} else {
|
|
return uprv_default_realloc(buffer, size);
|
|
}
|
|
}
|
|
}
|
|
|
|
U_CAPI void U_EXPORT2
|
|
uprv_free(void *buffer) {
|
|
#if U_DEBUG && defined(UPRV_MALLOC_COUNT)
|
|
putchar('<');
|
|
fflush(stdout);
|
|
#endif
|
|
if (buffer != zeroMem) {
|
|
if (pFree) {
|
|
(*pFree)(pContext, buffer);
|
|
} else {
|
|
uprv_default_free(buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
U_CAPI void * U_EXPORT2
|
|
uprv_calloc(size_t num, size_t size) {
|
|
void *mem = nullptr;
|
|
size *= num;
|
|
mem = uprv_malloc(size);
|
|
if (mem) {
|
|
uprv_memset(mem, 0, size);
|
|
}
|
|
return mem;
|
|
}
|
|
|
|
U_CAPI void U_EXPORT2
|
|
u_setMemoryFunctions(const void *context, UMemAllocFn *a, UMemReallocFn *r, UMemFreeFn *f, UErrorCode *status)
|
|
{
|
|
if (U_FAILURE(*status)) {
|
|
return;
|
|
}
|
|
if (a==nullptr || r==nullptr || f==nullptr) {
|
|
*status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
pContext = context;
|
|
pAlloc = a;
|
|
pRealloc = r;
|
|
pFree = f;
|
|
}
|
|
|
|
|
|
U_CFUNC UBool cmemory_cleanup() {
|
|
pContext = nullptr;
|
|
pAlloc = nullptr;
|
|
pRealloc = nullptr;
|
|
pFree = nullptr;
|
|
return true;
|
|
}
|