| drh | bbd42a6 | 2004-05-22 17:41:58 +0000 | [diff] [blame^] | 1 | /* |
| 2 | ** 2004 May 22 |
| 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 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 |
| 15 | ** files. |
| 16 | ** |
| 17 | ** This file should be #included by the os_*.c files only. It is not a |
| 18 | ** general purpose header file. |
| 19 | */ |
| 20 | |
| 21 | |
| 22 | /* |
| 23 | ** Macros for performance tracing. Normally turned off. Only works |
| 24 | ** on i486 hardware. |
| 25 | */ |
| 26 | #if 0 |
| 27 | static int last_page = 0; |
| 28 | __inline__ unsigned long long int hwtime(void){ |
| 29 | unsigned long long int x; |
| 30 | __asm__("rdtsc\n\t" |
| 31 | "mov %%edx, %%ecx\n\t" |
| 32 | :"=A" (x)); |
| 33 | return x; |
| 34 | } |
| 35 | static unsigned long long int g_start; |
| 36 | static unsigned int elapse; |
| 37 | #define TIMER_START g_start=hwtime() |
| 38 | #define TIMER_END elapse=hwtime()-g_start |
| 39 | #define SEEK(X) last_page=(X) |
| 40 | #define TRACE1(X) fprintf(stderr,X) |
| 41 | #define TRACE2(X,Y) fprintf(stderr,X,Y) |
| 42 | #define TRACE3(X,Y,Z) fprintf(stderr,X,Y,Z) |
| 43 | #define TRACE4(X,Y,Z,A) fprintf(stderr,X,Y,Z,A) |
| 44 | #define TRACE5(X,Y,Z,A,B) fprintf(stderr,X,Y,Z,A,B) |
| 45 | #else |
| 46 | #define TIMER_START |
| 47 | #define TIMER_END |
| 48 | #define SEEK(X) |
| 49 | #define TRACE1(X) |
| 50 | #define TRACE2(X,Y) |
| 51 | #define TRACE3(X,Y,Z) |
| 52 | #define TRACE4(X,Y,Z,A) |
| 53 | #define TRACE5(X,Y,Z,A,B) |
| 54 | #endif |
| 55 | |
| 56 | |
| 57 | /* |
| 58 | ** If we compile with the SQLITE_TEST macro set, then the following block |
| 59 | ** of code will give us the ability to simulate a disk I/O error. This |
| 60 | ** is used for testing the I/O recovery logic. |
| 61 | */ |
| 62 | #ifdef SQLITE_TEST |
| 63 | int sqlite3_io_error_pending = 0; |
| 64 | #define SimulateIOError(A) \ |
| 65 | if( sqlite3_io_error_pending ) \ |
| 66 | if( sqlite3_io_error_pending-- == 1 ){ local_ioerr(); return A; } |
| 67 | static void local_ioerr(){ |
| 68 | sqlite3_io_error_pending = 0; /* Really just a place to set a breakpoint */ |
| 69 | } |
| 70 | #else |
| 71 | #define SimulateIOError(A) |
| 72 | #endif |
| 73 | |
| 74 | /* |
| 75 | ** When testing, keep a count of the number of open files. |
| 76 | */ |
| 77 | #ifdef SQLITE_TEST |
| 78 | int sqlite3_open_file_count = 0; |
| 79 | #define OpenCounter(X) sqlite3_open_file_count+=(X) |
| 80 | #else |
| 81 | #define OpenCounter(X) |
| 82 | #endif |