95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 1997-2008, 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.H
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*
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* Contains stdlib.h/string.h memory functions
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*
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* @author Bertrand A. Damiba
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*
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* Modification History:
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*
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* Date Name Description
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* 6/20/98 Bertrand Created.
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* 05/03/99 stephen Changed from functions to macros.
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*
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******************************************************************************
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*/
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#ifndef CMEMORY_H
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#define CMEMORY_H
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#include "unicode/utypes.h"
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#include <stddef.h>
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#include <string.h>
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#define uprv_memcpy(dst, src, size) U_STANDARD_CPP_NAMESPACE memcpy(dst, src, size)
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#define uprv_memmove(dst, src, size) U_STANDARD_CPP_NAMESPACE memmove(dst, src, size)
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#define uprv_memset(buffer, mark, size) U_STANDARD_CPP_NAMESPACE memset(buffer, mark, size)
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#define uprv_memcmp(buffer1, buffer2, size) U_STANDARD_CPP_NAMESPACE memcmp(buffer1, buffer2,size)
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U_CAPI void * U_EXPORT2
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uprv_malloc(size_t s);
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U_CAPI void * U_EXPORT2
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uprv_realloc(void *mem, size_t size);
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U_CAPI void U_EXPORT2
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uprv_free(void *mem);
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/**
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* This should align the memory properly on any machine.
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* This is very useful for the safeClone functions.
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*/
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typedef union {
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long t1;
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double t2;
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void *t3;
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} UAlignedMemory;
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/**
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* Get the least significant bits of a pointer (a memory address).
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* For example, with a mask of 3, the macro gets the 2 least significant bits,
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* which will be 0 if the pointer is 32-bit (4-byte) aligned.
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*
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* ptrdiff_t is the most appropriate integer type to cast to.
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* size_t should work too, since on most (or all?) platforms it has the same
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* width as ptrdiff_t.
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*/
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#define U_POINTER_MASK_LSB(ptr, mask) (((ptrdiff_t)(char *)(ptr)) & (mask))
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/**
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* Get the amount of bytes that a pointer is off by from
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* the previous UAlignedMemory-aligned pointer.
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*/
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#define U_ALIGNMENT_OFFSET(ptr) U_POINTER_MASK_LSB(ptr, sizeof(UAlignedMemory) - 1)
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/**
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* Get the amount of bytes to add to a pointer
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* in order to get the next UAlignedMemory-aligned address.
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*/
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#define U_ALIGNMENT_OFFSET_UP(ptr) (sizeof(UAlignedMemory) - U_ALIGNMENT_OFFSET(ptr))
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/**
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* Indicate whether the ICU allocation functions have been used.
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* This is used to determine whether ICU is in an initial, unused state.
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*/
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U_CFUNC UBool
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cmemory_inUse(void);
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/**
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* Heap clean up function, called from u_cleanup()
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* Clears any user heap functions from u_setMemoryFunctions()
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* Does NOT deallocate any remaining allocated memory.
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*/
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U_CFUNC UBool
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cmemory_cleanup(void);
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#endif
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