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a290a84403
InnoDB: Remove HAVE_purify, UNIV_INIT_MEM_TO_ZERO, UNIV_SET_MEM_TO_ZERO. The compile-time setting HAVE_purify can mask potential bugs. It is being set in PB2 Valgrind runs. We should simply get rid of it, and replace it with UNIV_MEM_INVALID() to declare uninitialized memory as such in Valgrind-instrumented binaries. os_mem_alloc_large(), ut_malloc_low(): Remove the parameter set_to_zero. ut_malloc(): Define as a macro that invokes ut_malloc_low(). buf_pool_init(): Never initialize the buffer pool frames. All pages must be initialized before flushing them to disk. mem_heap_alloc(): Never initialize the allocated memory block. os_mem_alloc_nocache(), ut_test_malloc(): Unused function, remove. rb:813 approved by Jimmy Yang
155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/***********************************************************************
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Memory primitives
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(c) 1994, 1995 Innobase Oy
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Created 5/30/1994 Heikki Tuuri
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************************************************************************/
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#ifndef ut0mem_h
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#define ut0mem_h
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#include "univ.i"
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#include <string.h>
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#include <stdlib.h>
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/* The total amount of memory currently allocated from the OS with malloc */
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extern ulint ut_total_allocated_memory;
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UNIV_INLINE
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void*
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ut_memcpy(void* dest, const void* sour, ulint n);
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UNIV_INLINE
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void*
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ut_memmove(void* dest, const void* sour, ulint n);
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UNIV_INLINE
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int
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ut_memcmp(const void* str1, const void* str2, ulint n);
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/**************************************************************************
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Allocates memory. */
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void*
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ut_malloc_low(
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/*==========*/
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/* out, own: allocated memory */
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ulint n, /* in: number of bytes to allocate */
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ibool assert_on_error); /* in: if TRUE, we crash mysqld if
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the memory cannot be allocated */
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/**************************************************************************
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Allocates memory. */
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#define ut_malloc(n) ut_malloc_low(n, TRUE)
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/**************************************************************************
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Frees a memory block allocated with ut_malloc. */
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void
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ut_free(
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/*====*/
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void* ptr); /* in, own: memory block */
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/**************************************************************************
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Implements realloc. This is needed by /pars/lexyy.c. Otherwise, you should not
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use this function because the allocation functions in mem0mem.h are the
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recommended ones in InnoDB.
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man realloc in Linux, 2004:
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realloc() changes the size of the memory block pointed to
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by ptr to size bytes. The contents will be unchanged to
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the minimum of the old and new sizes; newly allocated mem
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ory will be uninitialized. If ptr is NULL, the call is
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equivalent to malloc(size); if size is equal to zero, the
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call is equivalent to free(ptr). Unless ptr is NULL, it
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must have been returned by an earlier call to malloc(),
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calloc() or realloc().
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RETURN VALUE
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realloc() returns a pointer to the newly allocated memory,
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which is suitably aligned for any kind of variable and may
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be different from ptr, or NULL if the request fails. If
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size was equal to 0, either NULL or a pointer suitable to
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be passed to free() is returned. If realloc() fails the
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original block is left untouched - it is not freed or
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moved. */
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void*
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ut_realloc(
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/*=======*/
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/* out, own: pointer to new mem block or NULL */
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void* ptr, /* in: pointer to old block or NULL */
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ulint size); /* in: desired size */
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/**************************************************************************
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Frees in shutdown all allocated memory not freed yet. */
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void
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ut_free_all_mem(void);
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/*=================*/
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UNIV_INLINE
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char*
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ut_strcpy(char* dest, const char* sour);
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UNIV_INLINE
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ulint
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ut_strlen(const char* str);
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UNIV_INLINE
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int
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ut_strcmp(const void* str1, const void* str2);
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/**************************************************************************
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Copies up to size - 1 characters from the NUL-terminated string src to
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dst, NUL-terminating the result. Returns strlen(src), so truncation
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occurred if the return value >= size. */
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ulint
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ut_strlcpy(
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/*=======*/
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/* out: strlen(src) */
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char* dst, /* in: destination buffer */
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const char* src, /* in: source buffer */
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ulint size); /* in: size of destination buffer */
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/**************************************************************************
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Like ut_strlcpy, but if src doesn't fit in dst completely, copies the last
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(size - 1) bytes of src, not the first. */
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ulint
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ut_strlcpy_rev(
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/*===========*/
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/* out: strlen(src) */
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char* dst, /* in: destination buffer */
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const char* src, /* in: source buffer */
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ulint size); /* in: size of destination buffer */
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/**************************************************************************
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Return the number of times s2 occurs in s1. Overlapping instances of s2
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are only counted once. */
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ulint
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ut_strcount(
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/*========*/
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/* out: the number of times s2 occurs in s1 */
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const char* s1, /* in: string to search in */
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const char* s2); /* in: string to search for */
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/**************************************************************************
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Replace every occurrence of s1 in str with s2. Overlapping instances of s1
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are only replaced once. */
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char *
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ut_strreplace(
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/*==========*/
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/* out, own: modified string, must be
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freed with mem_free() */
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const char* str, /* in: string to operate on */
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const char* s1, /* in: string to replace */
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const char* s2); /* in: string to replace s1 with */
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#ifndef UNIV_NONINL
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#include "ut0mem.ic"
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#endif
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#endif
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