When a VFS.xOpen fails, make sure the pMethods pointer is zeroed on the

sqlite3_file object so that subsequent xClose() operations against that
same file handler are no-ops.  Bug in the test_async.c module only - not
in the core library.  Ticket #3744. (CVS 6384)

FossilOrigin-Name: c32b454118f4b0cc615edb9b35f749db45f6b36d

manifest

@@ -1,5 +1,5 @@
-C Use\sfdatasync()\sonly\son\slinux,\sunless\s-Dfdatasync=fdatasync\sis\sset\sat\ncompilation\stime.\s(CVS\s6383)
-D 2009-03-25T01:06:02
+C When\sa\sVFS.xOpen\sfails,\smake\ssure\sthe\spMethods\spointer\sis\szeroed\son\sthe\r\nsqlite3_file\sobject\sso\sthat\ssubsequent\sxClose()\soperations\sagainst\sthat\r\nsame\sfile\shandler\sare\sno-ops.\s\sBug\sin\sthe\stest_async.c\smodule\sonly\s-\snot\r\nin\sthe\score\slibrary.\s\sTicket\s#3744.\s(CVS\s6384)
+D 2009-03-25T14:24:42
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -137,7 +137,7 @@ F src/mutex_os2.c 6b5a74f812082a8483c3df05b47bbaac2424b9a0
 F src/mutex_unix.c 2f936339dfef1a4c142db290d575a3509b77315f
 F src/mutex_w32.c f4b6a4a48f1dfff7f0089cba9b5a371691f17b8b
 F src/notify.c 5787adee6f119c7d36fd8937d31d680467e01ca5
-F src/os.c ed93a6b46132a602c4fd7a58142e2981c829c79d
+F src/os.c c2aa4a7d8bb845222e5c37f56cde377b20c3b087
 F src/os.h fa3f4aa0119ff721a2da4b47ffd74406ac864c05
 F src/os_common.h 8c61457df58f1a4bd5f5adc3e90e01b37bf7afbc
 F src/os_os2.c bed77dc26e3a95ce4a204936b9a1ca6fe612fcc5
@@ -173,7 +173,7 @@ F src/test6.c 1a0a7a1f179469044b065b4a88aab9faee114101
 F src/test7.c b94e68c2236de76889d82b8d7d8e00ad6a4d80b1
 F src/test8.c 3637439424d0d21ff2dcf9b015c30fcc1e7bcb24
 F src/test9.c 904ebe0ed1472d6bad17a81e2ecbfc20017dc237
-F src/test_async.c ae0b7528cdf425ef47f5c2c7c7f9b2fa777e792e
+F src/test_async.c 65f8d6e4e325291fd2fbb08be0133f20a6beffed
 F src/test_autoext.c f53b0cdf7bf5f08100009572a5d65cdb540bd0ad
 F src/test_backup.c 5b41518c5499dafe65177b0813b71ac356ee9df1
 F src/test_btree.c d7b8716544611c323860370ee364e897c861f1b0
@@ -709,7 +709,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 940d72d2bae95ddd1aea9b63424179735f440296
-R b19c5ed41e19ad8042490824f83b5b77
+P cbf2ca4cc41f1f710635b863db6e98074bd5e8bc
+R d7777eac8c1fbcbb9552d8027fab8eac
 U drh
-Z 6e13e4e2fd0eec7485fb0fffc49dff79
+Z 2c5cb94f5158d7c6913d1e9d91b2e660

manifest.uuid

@@ -1 +1 @@
-cbf2ca4cc41f1f710635b863db6e98074bd5e8bc
+c32b454118f4b0cc615edb9b35f749db45f6b36d

src/os.c

@@ -13,7 +13,7 @@
 ** This file contains OS interface code that is common to all
 ** architectures.
 **
-** $Id: os.c,v 1.125 2008/12/08 18:19:18 drh Exp $
+** $Id: os.c,v 1.126 2009/03/25 14:24:42 drh Exp $
 */
 #define _SQLITE_OS_C_ 1
 #include "sqliteInt.h"
@@ -112,8 +112,11 @@ int sqlite3OsOpen(
   int flags, 
   int *pFlagsOut
 ){
+  int rc;
   DO_OS_MALLOC_TEST;
-  return pVfs->xOpen(pVfs, zPath, pFile, flags, pFlagsOut);
+  rc = pVfs->xOpen(pVfs, zPath, pFile, flags, pFlagsOut);
+  assert( rc==SQLITE_OK || pFile->pMethods==0 );
+  return rc;
 }
 int sqlite3OsDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
   return pVfs->xDelete(pVfs, zPath, dirSync);

src/test_async.c

@@ -10,7 +10,7 @@
 **
 *************************************************************************
 **
-** $Id: test_async.c,v 1.50 2009/03/24 16:27:09 drh Exp $
+** $Id: test_async.c,v 1.51 2009/03/25 14:24:42 drh Exp $
 **
 ** This file contains an example implementation of an asynchronous IO 
 ** backend for SQLite.
@@ -419,7 +419,7 @@ struct AsyncFileData {
   sqlite3_file *pBaseWrite;  /* Write handle to the underlying Os file */
   AsyncFileLock lock;        /* Lock state for this handle */
   AsyncLock *pLock;          /* AsyncLock object for this file system entry */
-  AsyncWrite close;
+  AsyncWrite closeOp;        /* Preallocated close operation */
 };
 
 /*
@@ -701,7 +701,7 @@ static int asyncClose(sqlite3_file *pFile){
   p->lock.eLock = 0;
   pthread_mutex_unlock(&async.lockMutex);
 
-  addAsyncWrite(&p->close);
+  addAsyncWrite(&p->closeOp);
   return SQLITE_OK;
 }
 
@@ -1097,8 +1097,8 @@ static int asyncOpen(
   pData->pBaseRead = (sqlite3_file*)z;
   z += pVfs->szOsFile;
   pData->pBaseWrite = (sqlite3_file*)z;
-  pData->close.pFileData = pData;
-  pData->close.op = ASYNC_CLOSE;
+  pData->closeOp.pFileData = pData;
+  pData->closeOp.op = ASYNC_CLOSE;
 
   if( zName ){
     z += pVfs->szOsFile;
@@ -1186,6 +1186,9 @@ static int asyncOpen(
       sqlite3_free(pData);
     }
   }
+  if( rc!=SQLITE_OK ){
+    p->pMethod = 0;
+  }
   return rc;
 }