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Automatically deallocate thread-specific data when it is no longer

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being used.  Ticket #1601.  Also implemented the suggestion of
ticket #1603. Memory management is now off by default at compile-time.
The sqlite3_enable_memory_management() API has been removed. (CVS 2919)

FossilOrigin-Name: 5d9c6aa964305c3f36741ff0058da5b5f3ce0d24
This commit is contained in:
drh
2006-01-11 21:41:20 +00:00
parent 0203bde908
commit 6f7adc8a80
31 changed files with 334 additions and 299 deletions
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19
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.461 2006/01/11 14:09:32 danielk1977 Exp $
** @(#) $Id: sqliteInt.h,v 1.462 2006/01/11 21:41:22 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -286,14 +286,17 @@ extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */
#define sqliteAllocSize(x) sqlite3AllocSize(x)
/*
** An instance of this structure is allocated for each thread that uses SQLite.
** An instance of this structure might be allocated to store information
** specific to a single thread.
**
** To avoid a memory leak on windows, the content of this structure is
** checked at the conclusion of each API call. If it is all zero, it
** is deallocated.
*/
struct ThreadData {
u8 isInit; /* True if structure has been initialised */
u8 mallocFailed; /* True after a malloc() has failed */
#ifndef SQLITE_OMIT_MEMORY_MANAGEMENT
u8 useMemoryManagement; /* True if memory-management is enabled */
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
int nSoftHeapLimit; /* Suggested max mem allocation. No limit if <0 */
int nAlloc; /* Number of bytes currently allocated */
Pager *pPager; /* Linked list of all pagers in this thread */
@@ -306,7 +309,7 @@ struct ThreadData {
#ifdef SQLITE_MEMDEBUG
int nMaxAlloc; /* High water mark of ThreadData.nAlloc */
int mallocAllowed; /* assert() in sqlite3Malloc() if not set */
int mallocDisallowed; /* assert() in sqlite3Malloc() if set */
int isFail; /* True if all malloc() calls should fail */
const char *zFile; /* Filename to associate debugging info with */
int iLine; /* Line number to associate debugging info with */
@@ -1730,7 +1733,9 @@ void sqlite3AnalysisLoad(sqlite3*,int iDB);
void sqlite3DefaultRowEst(Index*);
void sqlite3RegisterLikeFunctions(sqlite3*, int);
int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
ThreadData *sqlite3ThreadData();
ThreadData *sqlite3ThreadData(void);
const ThreadData *sqlite3ThreadDataReadOnly(void);
void sqlite3ReleaseThreadData(void);
void sqlite3AttachFunctions(sqlite3 *);
void sqlite3MinimumFileFormat(Parse*, int, int);
void sqlite3SchemaFree(void *);