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Overview
Comment:Previous commit ((6401)) did not quite fix the problem. This should work better. (CVS 6402)
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SHA1: 2e7d3cc9f04de1fe7ef95cd5736dbc409c209cef
User & Date: drh 2009-03-28 23:47:11
Context
2009-03-29
00:13
Improvements to cost estimation for evaluating the IN operator. Ticket #3757. (CVS 6403) check-in: 0c438e81 user: drh tags: trunk
2009-03-28
23:47
Previous commit ((6401)) did not quite fix the problem. This should work better. (CVS 6402) check-in: 2e7d3cc9 user: drh tags: trunk
23:23
In the unix-backend, when simulating an I/O error on an unlock operation, still mark the connection as unlocked to avoid a future assert(). (CVS 6401) check-in: fb35cff8 user: drh tags: trunk
Changes
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Changes to src/os_unix.c.

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**   *  Definitions of sqlite3_io_methods objects for all locking
**      methods plus "finder" functions for each locking method.
**   *  sqlite3_vfs method implementations.
**   *  Locking primitives for the proxy uber-locking-method. (MacOSX only)
**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
**
** $Id: os_unix.c,v 1.246 2009/03/28 23:23:03 drh Exp $
*/
#include "sqliteInt.h"
#if SQLITE_OS_UNIX              /* This file is used on unix only */

/*
** There are various methods for file locking used for concurrency
** control:
................................................................................
      }else{
        int tErrno = errno;
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
        if( IS_LOCK_ERROR(rc) ){
          pFile->lastErrno = tErrno;
        }
        pLock->cnt = 1;
        pLock->locktype = locktype;

        goto end_unlock;
      }
    }

    /* Decrement the count of locks against this same file.  When the
    ** count reaches zero, close any other file descriptors whose close
    ** was deferred because of outstanding locks.







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**   *  Definitions of sqlite3_io_methods objects for all locking
**      methods plus "finder" functions for each locking method.
**   *  sqlite3_vfs method implementations.
**   *  Locking primitives for the proxy uber-locking-method. (MacOSX only)
**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
**
** $Id: os_unix.c,v 1.247 2009/03/28 23:47:11 drh Exp $
*/
#include "sqliteInt.h"
#if SQLITE_OS_UNIX              /* This file is used on unix only */

/*
** There are various methods for file locking used for concurrency
** control:
................................................................................
      }else{
        int tErrno = errno;
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
        if( IS_LOCK_ERROR(rc) ){
          pFile->lastErrno = tErrno;
        }
        pLock->cnt = 1;
        pLock->locktype = NO_LOCK;
        pFile->locktype = NO_LOCK;
        goto end_unlock;
      }
    }

    /* Decrement the count of locks against this same file.  When the
    ** count reaches zero, close any other file descriptors whose close
    ** was deferred because of outstanding locks.