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Overview
Comment:Add documentation on the sqlite3_mutex_methods object. (CVS 5232)
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SHA1: c3c7bfc9db6774824be14a1394e1842716dce8ec
User & Date: drh 2008-06-18 13:47:04.000
Context
2008-06-18
15:34
Make sure aggregate functions can take any number of arguments up to the limit imposed by SQLITE_LIMIT_FUNCTION_ARGS. Ticket #3179. Modify the group_concat() function to take an unlimited number of arguments in order to facilitate testing this behavior. (CVS 5233) (check-in: 70c6739f4e user: drh tags: trunk)
13:47
Add documentation on the sqlite3_mutex_methods object. (CVS 5232) (check-in: c3c7bfc9db user: drh tags: trunk)
13:27
Added new configuration options to query the low-level malloc interface and to provide memory buffers for scratch, page-cache, and heap memory allocators. (CVS 5231) (check-in: e36201a352 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/sqlite.h.in.
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** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.333 2008/06/18 13:27:47 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.








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** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.334 2008/06/18 13:47:04 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
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sqlite3_mutex *sqlite3_mutex_alloc(int);
void sqlite3_mutex_free(sqlite3_mutex*);
void sqlite3_mutex_enter(sqlite3_mutex*);
int sqlite3_mutex_try(sqlite3_mutex*);
void sqlite3_mutex_leave(sqlite3_mutex*);
int sqlite3_mutex_end(void);






















typedef struct sqlite3_mutex_methods sqlite3_mutex_methods;
struct sqlite3_mutex_methods {
  int (*xMutexInit)(void);
  sqlite3_mutex *(*xMutexAlloc)(int);
  void (*xMutexFree)(sqlite3_mutex *);
  void (*xMutexEnter)(sqlite3_mutex *);
  int (*xMutexTry)(sqlite3_mutex *);








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sqlite3_mutex *sqlite3_mutex_alloc(int);
void sqlite3_mutex_free(sqlite3_mutex*);
void sqlite3_mutex_enter(sqlite3_mutex*);
int sqlite3_mutex_try(sqlite3_mutex*);
void sqlite3_mutex_leave(sqlite3_mutex*);
int sqlite3_mutex_end(void);

/*
** CAPI3REF: Mutex Methods Object {F17120}
**
** An instance of this structure defines the low-level routines
** used to allocate and use mutexes.  This structure is used as
** an argument to the [SQLITE_CONFIG_MUTEX] and [SQLITE_CONFIG_GETMUTEX]
** options of [sqlite3_config()].  The methods defined by this
** structure implement the following interfaces (respectively):
**
** <ul>
** <li>  [sqlite3_mutex_init()] </li>
** <li>  [sqlite3_mutex_alloc()] </li>
** <li>  [sqlite3_mutex_free()] </li>
** <li>  [sqlite3_mutex_enter()] </li>
** <li>  [sqlite3_mutex_try()] </li>
** <li>  [sqlite3_mutex_leave()] </li>
** <li>  [sqlite3_mutex_end()] </li>
** <li>  [sqlite3_mutex_held()] </li>
** <li>  [sqlite3_mutex_notheld()] </li>
** </ul>
*/
typedef struct sqlite3_mutex_methods sqlite3_mutex_methods;
struct sqlite3_mutex_methods {
  int (*xMutexInit)(void);
  sqlite3_mutex *(*xMutexAlloc)(int);
  void (*xMutexFree)(sqlite3_mutex *);
  void (*xMutexEnter)(sqlite3_mutex *);
  int (*xMutexTry)(sqlite3_mutex *);
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