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8e6a4c6201
Test allocation of memory beforehand if we are trying to return a > 2 MB BLOB; normally InnoDB asserts if memory allocation fails ha_innodb.cc: Do not fetch all columns if change_active_index() is called during a query; a sum(a), max(a) query seemed to do that, doing unnecessary copying (the change actually made in the previous bk ci) Free BLOB heap of handle when MySQL calls some ::extra()'s
104 lines
2.6 KiB
C
104 lines
2.6 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, void* sour, ulint n);
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UNIV_INLINE
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void*
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ut_memmove(void* dest, void* sour, ulint n);
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UNIV_INLINE
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int
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ut_memcmp(void* str1, void* str2, ulint n);
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/**************************************************************************
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Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is
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defined and set_to_zero is TRUE. */
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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 set_to_zero); /* in: TRUE if allocated memory should be set
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to zero if UNIV_SET_MEM_TO_ZERO is defined */
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/**************************************************************************
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Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is
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defined. */
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void*
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ut_malloc(
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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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/**************************************************************************
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Tests if malloc of n bytes would succeed. ut_malloc() asserts if memory runs
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out. It cannot be used if we want to return an error message. Prints to
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stderr a message if fails. */
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ibool
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ut_test_malloc(
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/*===========*/
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/* out: TRUE if succeeded */
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ulint n); /* in: try to allocate this many bytes */
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/**************************************************************************
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Frees a memory bloock 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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Frees 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, 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(void* str1, void* str2);
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/**************************************************************************
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Catenates two strings into newly allocated memory. The memory must be freed
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using mem_free. */
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char*
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ut_str_catenate(
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/*============*/
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/* out, own: catenated null-terminated string */
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char* str1, /* in: null-terminated string */
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char* str2); /* in: null-terminated string */
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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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