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| 1 /* | |
| 2 ** 2007 August 28 | |
| 3 ** | |
| 4 ** The author disclaims copyright to this source code. In place of | |
| 5 ** a legal notice, here is a blessing: | |
| 6 ** | |
| 7 ** May you do good and not evil. | |
| 8 ** May you find forgiveness for yourself and forgive others. | |
| 9 ** May you share freely, never taking more than you give. | |
| 10 ** | |
| 11 ************************************************************************* | |
| 12 ** | |
| 13 ** This file contains the common header for all mutex implementations. | |
| 14 ** The sqliteInt.h header #includes this file so that it is available | |
| 15 ** to all source files. We break it out in an effort to keep the code | |
| 16 ** better organized. | |
| 17 ** | |
| 18 ** NOTE: source files should *not* #include this header file directly. | |
| 19 ** Source files should #include the sqliteInt.h file and let that file | |
| 20 ** include this one indirectly. | |
| 21 ** | |
| 22 ** $Id: mutex.h,v 1.9 2008/10/07 15:25:48 drh Exp $ | |
| 23 */ | |
| 24 | |
| 25 | |
| 26 /* | |
| 27 ** Figure out what version of the code to use. The choices are | |
| 28 ** | |
| 29 ** SQLITE_MUTEX_OMIT No mutex logic. Not even stubs. The | |
| 30 ** mutexes implemention cannot be overridden | |
| 31 ** at start-time. | |
| 32 ** | |
| 33 ** SQLITE_MUTEX_NOOP For single-threaded applications. No | |
| 34 ** mutual exclusion is provided. But this | |
| 35 ** implementation can be overridden at | |
| 36 ** start-time. | |
| 37 ** | |
| 38 ** SQLITE_MUTEX_PTHREADS For multi-threaded applications on Unix. | |
| 39 ** | |
| 40 ** SQLITE_MUTEX_W32 For multi-threaded applications on Win32. | |
| 41 ** | |
| 42 ** SQLITE_MUTEX_OS2 For multi-threaded applications on OS/2. | |
| 43 */ | |
| 44 #if !SQLITE_THREADSAFE | |
| 45 # define SQLITE_MUTEX_OMIT | |
| 46 #endif | |
| 47 #if SQLITE_THREADSAFE && !defined(SQLITE_MUTEX_NOOP) | |
| 48 # if SQLITE_OS_UNIX | |
| 49 # define SQLITE_MUTEX_PTHREADS | |
| 50 # elif SQLITE_OS_WIN | |
| 51 # define SQLITE_MUTEX_W32 | |
| 52 # elif SQLITE_OS_OS2 | |
| 53 # define SQLITE_MUTEX_OS2 | |
| 54 # else | |
| 55 # define SQLITE_MUTEX_NOOP | |
| 56 # endif | |
| 57 #endif | |
| 58 | |
| 59 #ifdef SQLITE_MUTEX_OMIT | |
| 60 /* | |
| 61 ** If this is a no-op implementation, implement everything as macros. | |
| 62 */ | |
| 63 #define sqlite3_mutex_alloc(X) ((sqlite3_mutex*)8) | |
| 64 #define sqlite3_mutex_free(X) | |
| 65 #define sqlite3_mutex_enter(X) | |
| 66 #define sqlite3_mutex_try(X) SQLITE_OK | |
| 67 #define sqlite3_mutex_leave(X) | |
| 68 #define sqlite3_mutex_held(X) 1 | |
| 69 #define sqlite3_mutex_notheld(X) 1 | |
| 70 #define sqlite3MutexAlloc(X) ((sqlite3_mutex*)8) | |
| 71 #define sqlite3MutexInit() SQLITE_OK | |
| 72 #define sqlite3MutexEnd() | |
| 73 #endif /* defined(SQLITE_OMIT_MUTEX) */ | |
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Chromium Code Reviews
Issue 3108030:
Move bundled copy of sqlite one level deeper to better separate it... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/