Add the SQLITE_EXTRA_DURABLE compile-time option.

FossilOrigin-Name: 30671345b1c1ee55a2d1aa17273213f1849efd81

diff --git a/manifest b/manifest
index e1fe265cc4549613def7359e31a20ebed6a30491..69e58459fa73fd6be4b573387b10defc06680f87 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Small\ssimplification\sto\sthe\sprepare\sstatement\sopcode\smemory\sreuse\slogic.\nEasier\sto\sread,\sand\sslightly\ssmaller\sand\sfaster.
-D 2016-01-25T02:15:02.255
+C Add\sthe\sSQLITE_EXTRA_DURABLE\scompile-time\soption.
+D 2016-01-25T13:55:47.049
 F Makefile.in 027c1603f255390c43a426671055a31c0a65fdb4
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 1708a78eda223b6daa302b140037fcc214a779f9
@@ -332,7 +332,7 @@ F src/os_setup.h c9d4553b5aaa6f73391448b265b89bed0b890faa
 F src/os_unix.c 0eb7f469fcd4e1fbedf30060438e26b839ec5486
 F src/os_win.c 386fba30419e8458b13209781c2af5590eab2811
 F src/os_win.h eb7a47aa17b26b77eb97e4823f20a00b8bda12ca
-F src/pager.c f4e9ac39fbb1e0fde97af85c0f4e00eb90764b67
+F src/pager.c 2916c66aee50f69d9ec56a7619b62d9c6a3bee61
 F src/pager.h 1c2a49143dfba9e69cc8159ef019f472ed8d260b
 F src/parse.y caad1e98edeca6960493d0c60d31b76820dd7776
 F src/pcache.c 73895411fa6b7bd6f0091212feabbe833b358d23
@@ -1419,7 +1419,7 @@ F tool/vdbe_profile.tcl 246d0da094856d72d2c12efec03250d71639d19f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 0a9cff5c4822874b74e90bfca3963bc7e5c753a5
-R 5ad29c29cc49b0c7f9cd0947deba5a80
+P 8a1deae497edf3fa43fa96152d140405398c5ed6
+R ae4ccddaf3c593cdf1ed2beb484cfd15
 U drh
-Z 5c673e5ee459b55b04084dc37cebc110
+Z 297086babbdf85e61ae58e42a437c1ec

diff --git a/manifest.uuid b/manifest.uuid
index f04ce16d0b23f298c3f1d21522b8b9992f1a5fcf..439be2e5fa0862a38da80418095ba87a292c6022 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-8a1deae497edf3fa43fa96152d140405398c5ed6
\ No newline at end of file
+30671345b1c1ee55a2d1aa17273213f1849efd81
\ No newline at end of file

diff --git a/src/pager.c b/src/pager.c
index 2c904d2df1f0f5ca08f9566851b5b9a9e319b9de..0afbe215c62b94432f4740f25060ee295a5d9c4e 100644 (file)
--- a/src/pager.c
+++ b/src/pager.c
@@ -428,6 +428,20 @@ int sqlite3PagerTrace=1;  /* True to enable tracing */
 */
 #define MAX_SECTOR_SIZE 0x10000
 
+/*
+** If the option SQLITE_EXTRA_DURABLE option is set at compile-time, then
+** SQLite will do extra fsync() operations when synchronous==FULL to help
+** ensure that transactions are durable across a power failure.  Most
+** applications are happy as long as transactions are consistent across
+** a power failure, and are perfectly willing to lose the last transaction
+** in exchange for the extra performance of avoiding directory syncs.
+** And so the default SQLITE_EXTRA_DURABLE setting is off.
+*/
+#ifndef SQLITE_EXTRA_DURABLE
+# define SQLITE_EXTRA_DURABLE 0
+#endif
+
+
 /*
 ** An instance of the following structure is allocated for each active
 ** savepoint and statement transaction in the system. All such structures
@@ -1983,7 +1997,8 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){
       );
       sqlite3OsClose(pPager->jfd);
       if( bDelete ){
-        rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
+        rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 
+                 pPager->fullSync && SQLITE_EXTRA_DURABLE);
       }
     }
   }