Add the SQLITE_BUSY_RESERVED_LOCK compile-time option. (CVS 1894)

FossilOrigin-Name: 25fe7a42ec2e06e659d7a0a6664789114c007e17

manifest

@@ -1,5 +1,5 @@
-C Make\ssure\sthe\sdatabase\sfile\sis\scorrectly\struncated\safter\sa\sROLLBACK\sthat\noccurs\safter\sa\sstatement\sabort.\s(CVS\s1893)
-D 2004-08-18T19:09:44
+C Add\sthe\sSQLITE_BUSY_RESERVED_LOCK\scompile-time\soption.\s(CVS\s1894)
+D 2004-08-19T13:29:15
 F Makefile.in 4a5e570a9e2d35b09c31b3cf01b78cea764ade4b
 F Makefile.linux-gcc a9e5a0d309fa7c38e7c14d3ecf7690879d3a5457
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -51,7 +51,7 @@ F src/os_unix.c 3239a45dbd2f50195bfc97f1ed35cb8fe5a3f60c
 F src/os_unix.h f3097815e041e82e24d92505e1ff61ba24172d13
 F src/os_win.c 54181eb73cb4783c4241feca9eaa490768b39008
 F src/os_win.h babd4e912967c6b09088cfe38a45e8005a07ba44
-F src/pager.c f42404ba6858cb3744deca6bb764af6f4ed0275e
+F src/pager.c 2698653a3bd895b2156c108a37a32d240a55bb0e
 F src/pager.h 67739fe649f33be55dba522ca8a9cc4e42d14f71
 F src/parse.y 589b1a39b23092888adfa9ec1f3ded8a35e8e006
 F src/pragma.c 5cf335adfdac453a2d03ab0c82f93847c43bea81
@@ -243,7 +243,7 @@ F www/tclsqlite.tcl 06a86cba4d7fc88e2bcd633b57702d3d16abebb5
 F www/vdbe.tcl 59288db1ac5c0616296b26dce071c36cb611dfe9
 F www/version3.tcl 092a01f5ef430d2c4acc0ae558d74c4bb89638a0
 F www/whentouse.tcl a8335bce47cc2fddb07f19052cb0cb4d9129a8e4
-P 1cc0323f2597584b3f3239e8948ac3ff3db8da03
-R 2c16cf3adea0061c2a5685694da75e5b
+P 6afe467d146828d67ad17af21604c2e691aa5dff
+R 319dc5d1048c9651b555d207e2714318
 U drh
-Z 53449f732f05d53766a7cbf7eda7107f
+Z 95969acf17ceb191e29fa59d164b79d1

manifest.uuid

@@ -1 +1 @@
-6afe467d146828d67ad17af21604c2e691aa5dff
+25fe7a42ec2e06e659d7a0a6664789114c007e17

src/pager.c

@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.158 2004/08/18 19:09:44 drh Exp $
+** @(#) $Id: pager.c,v 1.159 2004/08/19 13:29:15 drh Exp $
 */
 #include "os.h"         /* Must be first to enable large file support */
 #include "sqliteInt.h"
@@ -2417,7 +2417,7 @@ int sqlite3pager_begin(void *pData){
       pPager->state = PAGER_EXCLUSIVE;
       pPager->origDbSize = pPager->dbSize;
     }else{
-#if 0
+#ifdef SQLITE_BUSY_RESERVED_LOCK
       int busy = 1;
       do {
         rc = sqlite3OsLock(&pPager->fd, RESERVED_LOCK);
@@ -2426,8 +2426,9 @@ int sqlite3pager_begin(void *pData){
           pPager->pBusyHandler->xFunc && 
           pPager->pBusyHandler->xFunc(pPager->pBusyHandler->pArg, busy++)
       );
-#endif
+#else
       rc = sqlite3OsLock(&pPager->fd, RESERVED_LOCK);
+#endif
       if( rc!=SQLITE_OK ){
         /* We do not call the busy handler when we fail to get a reserved lock.
         ** The only reason we might fail is because another process is holding