4 ** The author disclaims copyright to this source code. In place of
5 ** a legal notice, here is a blessing:
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.
11 ******************************************************************************
13 ** This file contains macros and a little bit of code that is common to
14 ** all of the platform-specific files (os_*.c) and is #included into those
17 ** This file should be #included by the os_*.c files only. It is not a
18 ** general purpose header file.
24 ** At least two bugs have slipped in because we changed the MEMORY_DEBUG
25 ** macro to SQLITE_DEBUG and some older makefiles have not yet made the
26 ** switch. The following code should catch this problem at compile-time.
29 # error "The MEMORY_DEBUG macro is obsolete. Use SQLITE_DEBUG instead."
33 int sqlite3OSTrace = 0;
34 #define OSTRACE(X) if( sqlite3OSTrace ) sqlite3DebugPrintf X
40 ** Macros for performance tracing. Normally turned off. Only works
43 #ifdef SQLITE_PERFORMANCE_TRACE
46 ** hwtime.h contains inline assembler code for implementing
47 ** high-performance timing routines.
51 static sqlite_uint64 g_start;
52 static sqlite_uint64 g_elapsed;
53 #define TIMER_START g_start=sqlite3Hwtime()
54 #define TIMER_END g_elapsed=sqlite3Hwtime()-g_start
55 #define TIMER_ELAPSED g_elapsed
59 #define TIMER_ELAPSED ((sqlite_uint64)0)
63 ** If we compile with the SQLITE_TEST macro set, then the following block
64 ** of code will give us the ability to simulate a disk I/O error. This
65 ** is used for testing the I/O recovery logic.
68 int sqlite3_io_error_hit = 0; /* Total number of I/O Errors */
69 int sqlite3_io_error_hardhit = 0; /* Number of non-benign errors */
70 int sqlite3_io_error_pending = 0; /* Count down to first I/O error */
71 int sqlite3_io_error_persist = 0; /* True if I/O errors persist */
72 int sqlite3_io_error_benign = 0; /* True if errors are benign */
73 int sqlite3_diskfull_pending = 0;
74 int sqlite3_diskfull = 0;
75 #define SimulateIOErrorBenign(X) sqlite3_io_error_benign=(X)
76 #define SimulateIOError(CODE) \
77 if( (sqlite3_io_error_persist && sqlite3_io_error_hit) \
78 || sqlite3_io_error_pending-- == 1 ) \
79 { local_ioerr(); CODE; }
80 static void local_ioerr(){
82 sqlite3_io_error_hit++;
83 if( !sqlite3_io_error_benign ) sqlite3_io_error_hardhit++;
85 #define SimulateDiskfullError(CODE) \
86 if( sqlite3_diskfull_pending ){ \
87 if( sqlite3_diskfull_pending == 1 ){ \
89 sqlite3_diskfull = 1; \
90 sqlite3_io_error_hit = 1; \
93 sqlite3_diskfull_pending--; \
97 #define SimulateIOErrorBenign(X)
98 #define SimulateIOError(A)
99 #define SimulateDiskfullError(A)
103 ** When testing, keep a count of the number of open files.
106 int sqlite3_open_file_count = 0;
107 #define OpenCounter(X) sqlite3_open_file_count+=(X)
109 #define OpenCounter(X)
112 #endif /* !defined(_OS_COMMON_H_) */