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Remove the vestigial mem4 and mem6 memory allocators. Add the

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SQLITE_ZERO_MALLOC compile-time option and the mem0.c module to
handle memory allocation for that case. (CVS 5848)

FossilOrigin-Name: 4651f590f0b8bf13938b2b15d5082136e763af8d
This commit is contained in:
drh
2008-10-28 18:58:20 +00:00
parent 27c3bd7b73
commit d1370b6d92
12 changed files with 103 additions and 972 deletions
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26
src/mem5.c
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@@ -23,38 +23,16 @@
** This version of the memory allocation subsystem is included
** in the build only if SQLITE_ENABLE_MEMSYS5 is defined.
**
** $Id: mem5.c,v 1.14 2008/09/02 17:52:52 danielk1977 Exp $
** $Id: mem5.c,v 1.15 2008/10/28 18:58:20 drh Exp $
*/
#include "sqliteInt.h"
/*
** This version of the memory allocator is used only when
** SQLITE_POW2_MEMORY_SIZE is defined.
** SQLITE_ENABLE_MEMSYS5 is defined.
*/
#ifdef SQLITE_ENABLE_MEMSYS5
/*
** Log2 of the minimum size of an allocation. For example, if
** 4 then all allocations will be rounded up to at least 16 bytes.
** If 5 then all allocations will be rounded up to at least 32 bytes.
*/
#ifndef SQLITE_POW2_LOGMIN
# define SQLITE_POW2_LOGMIN 6
#endif
/*
** Log2 of the maximum size of an allocation.
*/
#ifndef SQLITE_POW2_LOGMAX
# define SQLITE_POW2_LOGMAX 20
#endif
#define POW2_MAX (((unsigned int)1)<<SQLITE_POW2_LOGMAX)
/*
** Number of distinct allocation sizes.
*/
#define NSIZE (SQLITE_POW2_LOGMAX - SQLITE_POW2_LOGMIN + 1)
/*
** A minimum allocation is an instance of the following structure.
** Larger allocations are an array of these structures where the