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Overview
| Comment: | Add the SQLITE_PTRSIZE macro. Use it to help sqlite3_status() run faster on 32-bit systems. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | status64 |
| Files: | files | file ages | folders |
| SHA1: |
c742bd6047bc6d0319a5a8c31d97f6b9 |
| User & Date: | drh 2015-03-23 18:52:56 |
Context
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2015-03-23
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| 19:16 | Fix a non-C89 variable declaration that causes problems for MSVC. (Closed-Leaf check-in: 3de085ea user: drh tags: status64) | |
| 18:52 | Add the SQLITE_PTRSIZE macro. Use it to help sqlite3_status() run faster on 32-bit systems. (check-in: c742bd60 user: drh tags: status64) | |
| 17:25 | Add the sqlite3_status64() interface. Make the new interface and the legacy sqlite3_status() both atomic and threadsafe. Check threadsafety using assert()s. (check-in: 1ce8e8fa user: drh tags: status64) | |
Changes
Changes to src/main.c.
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#ifdef SQLITE_OMIT_WSD
rc = sqlite3_wsd_init(4096, 24);
if( rc!=SQLITE_OK ){
return rc;
}
#endif
/* If SQLite is already completely initialized, then this call
** to sqlite3_initialize() should be a no-op. But the initialization
** must be complete. So isInit must not be set until the very end
** of this routine.
*/
if( sqlite3GlobalConfig.isInit ) return SQLITE_OK;
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#ifdef SQLITE_OMIT_WSD
rc = sqlite3_wsd_init(4096, 24);
if( rc!=SQLITE_OK ){
return rc;
}
#endif
/* If the following assert() fails on some obscure processor/compiler
** combination, the work-around is to set the correct pointer
** size at compile-time using -DSQLITE_PTRSIZE=n compile-time option */
assert( SQLITE_PTRSIZE==sizeof(char*) );
/* If SQLite is already completely initialized, then this call
** to sqlite3_initialize() should be a no-op. But the initialization
** must be complete. So isInit must not be set until the very end
** of this routine.
*/
if( sqlite3GlobalConfig.isInit ) return SQLITE_OK;
|
Changes to src/sqliteInt.h.
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** The LogEst can be negative to indicate fractional values. ** Examples: ** ** 0.5 -> -10 0.1 -> -33 0.0625 -> -40 */ typedef INT16_TYPE LogEst; /* ** Macros to determine whether the machine is big or little endian, ** and whether or not that determination is run-time or compile-time. ** ** For best performance, an attempt is made to guess at the byte-order ** using C-preprocessor macros. If that is unsuccessful, or if ** -DSQLITE_RUNTIME_BYTEORDER=1 is set, then byte-order is determined |
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** The LogEst can be negative to indicate fractional values. ** Examples: ** ** 0.5 -> -10 0.1 -> -33 0.0625 -> -40 */ typedef INT16_TYPE LogEst; /* ** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer */ #ifndef SQLITE_PTRSIZE # if defined(__SIZEOF_POINTER__) # define SQLITE_PTRSIZE __SIZEOF_POINTER__ # elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \ defined(_M_ARM) || defined(__arm__) || defined(__x86) # define SQLITE_PTRSIZE 4 # else # define SQLITE_PTRSIZE 8 # endif #endif /* ** Macros to determine whether the machine is big or little endian, ** and whether or not that determination is run-time or compile-time. ** ** For best performance, an attempt is made to guess at the byte-order ** using C-preprocessor macros. If that is unsuccessful, or if ** -DSQLITE_RUNTIME_BYTEORDER=1 is set, then byte-order is determined |
Changes to src/status.c.
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#include "vdbeInt.h"
/*
** Variables in which to record status information.
*/
typedef struct sqlite3StatType sqlite3StatType;
static SQLITE_WSD struct sqlite3StatType {
sqlite3_int64 nowValue[10]; /* Current value */
sqlite3_int64 mxValue[10]; /* Maximum value */
} sqlite3Stat = { {0,}, {0,} };
/*
** Elements of sqlite3Stat[] are protected by either the memory allocator
** mutex, or by the pcache1 mutex. The following array determines which.
*/
static const char statMutex[] = {
................................................................................
int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetFlag){
sqlite3_int64 iCur, iHwtr;
int rc;
#ifdef SQLITE_ENABLE_API_ARMOR
if( pCurrent==0 || pHighwater==0 ) return SQLITE_MISUSE_BKPT;
#endif
rc = sqlite3_status64(op, &iCur, &iHwtr, resetFlag);
*pCurrent = (int)iCur;
*pHighwater = (int)iHwtr;
return rc;
}
/*
** Query status information for a single database connection
*/
int sqlite3_db_status(
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#include "vdbeInt.h"
/*
** Variables in which to record status information.
*/
typedef struct sqlite3StatType sqlite3StatType;
static SQLITE_WSD struct sqlite3StatType {
#if SQLITE_PTRSIZE>4
sqlite3_int64 nowValue[10]; /* Current value */
sqlite3_int64 mxValue[10]; /* Maximum value */
#else
u32 nowValue[10]; /* Current value */
u32 mxValue[10]; /* Maximum value */
#endif
} sqlite3Stat = { {0,}, {0,} };
/*
** Elements of sqlite3Stat[] are protected by either the memory allocator
** mutex, or by the pcache1 mutex. The following array determines which.
*/
static const char statMutex[] = {
................................................................................
int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetFlag){
sqlite3_int64 iCur, iHwtr;
int rc;
#ifdef SQLITE_ENABLE_API_ARMOR
if( pCurrent==0 || pHighwater==0 ) return SQLITE_MISUSE_BKPT;
#endif
rc = sqlite3_status64(op, &iCur, &iHwtr, resetFlag);
if( rc==0 ){
*pCurrent = (int)iCur;
*pHighwater = (int)iHwtr;
}
return rc;
}
/*
** Query status information for a single database connection
*/
int sqlite3_db_status(
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