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More aggressive retry schedule in sqlite_busy_timeout(). (CVS 1181)

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FossilOrigin-Name: 5e85025be7aa4a03b0cfb4d0f28a2e44653b9d3f
This commit is contained in:
drh
2004-01-15 13:29:31 +00:00
parent 23b2db23b4
commit d1bec47a3d
4 changed files with 37 additions and 24 deletions
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29
src/main.c
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@@ -14,7 +14,7 @@
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.145 2004/01/15 02:44:03 drh Exp $
** $Id: main.c,v 1.146 2004/01/15 13:29:32 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -784,22 +784,23 @@ static int sqliteDefaultBusyCallback(
int count /* Number of times table has been busy */
){
#if SQLITE_MIN_SLEEP_MS==1
int delay = 10;
int prior_delay = 0;
static const char delays[] =
{ 1, 2, 5, 10, 15, 20, 25, 25, 25, 50, 50, 50, 100};
static const short int totals[] =
{ 0, 1, 3, 8, 18, 33, 53, 78, 103, 128, 178, 228, 287};
# define NDELAY (sizeof(delays)/sizeof(delays[0]))
int timeout = (int)Timeout;
int i;
int delay, prior;
for(i=1; i<count; i++){
prior_delay += delay;
delay = delay*2;
if( delay>=1000 ){
delay = 1000;
prior_delay += 1000*(count - i - 1);
break;
}
if( count <= NDELAY ){
delay = delays[count-1];
prior = totals[count-1];
}else{
delay = delays[NDELAY-1];
prior = totals[NDELAY-1] + delay*(count-NDELAY-1);
}
if( prior_delay + delay > timeout ){
delay = timeout - prior_delay;
if( prior + delay > timeout ){
delay = timeout - prior;
if( delay<=0 ) return 0;
}
sqliteOsSleep(delay);