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Merge updates from trunk.

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FossilOrigin-Name: a3cfd81339267c87db511cedf35ec209ee1f1a72
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mistachkin
2014-05-05 17:45:44 +00:00
parent fdf9f045b7 72de9addc7
commit 0e56c52e1d
3 changed files with 41 additions and 10 deletions
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37
src/os_win.c
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@@ -1836,6 +1836,32 @@ static int winLogErrorAtLine(
static int winIoerrRetry = SQLITE_WIN32_IOERR_RETRY;
static int winIoerrRetryDelay = SQLITE_WIN32_IOERR_RETRY_DELAY;
/*
** The "winIoerrCanRetry1" macro is used to determine if a particular I/O
** error code obtained via GetLastError() is eligible to be retried. It
** must accept the error code DWORD as its only argument and should return
** non-zero if the error code is transient in nature and the operation
** responsible for generating the original error might succeed upon being
** retried. The argument to this macro should be a variable.
**
** Additionally, a macro named "winIoerrCanRetry2" may be defined. If it
** is defined, it will be consulted only when the macro "winIoerrCanRetry1"
** returns zero. The "winIoerrCanRetry2" macro is completely optional and
** may be used to include additional error codes in the set that should
** result in the failing I/O operation being retried by the caller. If
** defined, the "winIoerrCanRetry2" macro must exhibit external semantics
** identical to those of the "winIoerrCanRetry1" macro.
*/
#if !defined(winIoerrCanRetry1)
#define winIoerrCanRetry1(a) (((a)==ERROR_ACCESS_DENIED) || \
((a)==ERROR_SHARING_VIOLATION) || \
((a)==ERROR_LOCK_VIOLATION) || \
((a)==ERROR_DEV_NOT_EXIST) || \
((a)==ERROR_NETNAME_DELETED) || \
((a)==ERROR_SEM_TIMEOUT) || \
((a)==ERROR_NETWORK_UNREACHABLE))
#endif
/*
** If a ReadFile() or WriteFile() error occurs, invoke this routine
** to see if it should be retried. Return TRUE to retry. Return FALSE
@@ -1849,13 +1875,18 @@ static int winRetryIoerr(int *pnRetry, DWORD *pError){
}
return 0;
}
if( e==ERROR_ACCESS_DENIED ||
e==ERROR_LOCK_VIOLATION ||
e==ERROR_SHARING_VIOLATION ){
if( winIoerrCanRetry1(e) ){
sqlite3_win32_sleep(winIoerrRetryDelay*(1+*pnRetry));
++*pnRetry;
return 1;
}
#if defined(winIoerrCanRetry2)
else if( winIoerrCanRetry2(e) ){
sqlite3_win32_sleep(winIoerrRetryDelay*(1+*pnRetry));
++*pnRetry;
return 1;
}
#endif
if( pError ){
*pError = e;
}