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Avoid unnecessary calls to FCNTL_SIZE_HINT. Return an error to the user if the file-control invoked by "PRAGMA mmap_size" returns a value other than SQLITE_OK or SQLITE_NOTFOUND.

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FossilOrigin-Name: 40cfde8b4a59a09e52e62f9f029f8d3b32eb15fa
This commit is contained in:
dan
2013-05-23 10:13:18 +00:00
parent 34e258c942
commit 3719f5f600
4 changed files with 17 additions and 12 deletions
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16
manifest
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@@ -1,5 +1,5 @@
C Cause\sthe\smmap_size\sPRAGMA\sto\simmediately\schange\sthe\smmap\sspace\sif\sthe\ndatabase\sconnection\sis\salready\sactive.\s\sIn\sparticular,\sreducing\smmap_size\nwill\simmediately\sfree\sup\sprocess\saddress\sspace. C Avoid\sunnecessary\scalls\sto\sFCNTL_SIZE_HINT.\sReturn\san\serror\sto\sthe\suser\sif\sthe\sfile-control\sinvoked\sby\s"PRAGMA\smmap_size"\sreturns\sa\svalue\sother\sthan\sSQLITE_OK\sor\sSQLITE_NOTFOUND.
D 2013-05-23T01:40:53.974 D 2013-05-23T10:13:18.105
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in f6b58b7bdf6535f0f0620c486dd59aa4662c0b4f F Makefile.in f6b58b7bdf6535f0f0620c486dd59aa4662c0b4f
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -179,13 +179,13 @@ F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
F src/os_unix.c 42c9b8b7c61c9fa3561258f523be5749e52ed0e0 F src/os_unix.c 42c9b8b7c61c9fa3561258f523be5749e52ed0e0
F src/os_win.c 5f018dbd4cec25c5b47e11432b946a7d2ccee60b F src/os_win.c 5f018dbd4cec25c5b47e11432b946a7d2ccee60b
F src/pager.c 49e23f9898113ddfe90942bdf1c1ef57955d0921 F src/pager.c 3709c5c9e2eb566fffba6348508b7212c4d06ca3
F src/pager.h 5cb78b8e1adfd5451e600be7719f5a99d87ac3b1 F src/pager.h 5cb78b8e1adfd5451e600be7719f5a99d87ac3b1
F src/parse.y 9708365594eea519cdc8504dee425c0a41c79502 F src/parse.y 9708365594eea519cdc8504dee425c0a41c79502
F src/pcache.c f8043b433a57aba85384a531e3937a804432a346 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
F src/pcache1.c 9fd22671c270b35131ef480bbc00392b8b5f8ab9 F src/pcache1.c 9fd22671c270b35131ef480bbc00392b8b5f8ab9
F src/pragma.c 8779308bc1ea1901c4bc94dfe9a83d436f73f52c F src/pragma.c 8bf4bfaef7975abff45e55230ed1033b5f208d11
F src/prepare.c 743e484233c51109666d402f470523553b41797c F src/prepare.c 743e484233c51109666d402f470523553b41797c
F src/printf.c 4a9f882f1c1787a8b494a2987765acf9d97ac21f F src/printf.c 4a9f882f1c1787a8b494a2987765acf9d97ac21f
F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50 F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
@@ -1066,7 +1066,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
P 118a3b35693b134d56ebd780123b7fd6f1497668 P 761177927cb51e4f5e66061ca39cf37edbe8346b
R 743f49e6500daee258364b50095b5869 R f79c1bfda6a2029cdca9b19f9c8cc1f9
U drh U dan
Z 8b8fce9c808b567d366ba2a76c063d60 Z 2a86c7dc006c06bc92b2aaaf78345975

2
manifest.uuid
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@@ -1 +1 @@
761177927cb51e4f5e66061ca39cf37edbe8346b 40cfde8b4a59a09e52e62f9f029f8d3b32eb15fa

3
src/pager.c
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@@ -4214,7 +4214,8 @@ static int pager_write_pagelist(Pager *pPager, PgHdr *pList){
*/ */
assert( rc!=SQLITE_OK || isOpen(pPager->fd) ); assert( rc!=SQLITE_OK || isOpen(pPager->fd) );
if( rc==SQLITE_OK if( rc==SQLITE_OK
&& (pList->pDirty ? pPager->dbSize : pList->pgno+1)>pPager->dbHintSize && pPager->dbHintSize<pPager->dbSize
&& (pList->pDirty || pList->pgno>pPager->dbHintSize)
){ ){
sqlite3_int64 szFile = pPager->pageSize * (sqlite3_int64)pPager->dbSize; sqlite3_int64 szFile = pPager->pageSize * (sqlite3_int64)pPager->dbSize;
sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_SIZE_HINT, &szFile); sqlite3OsFileControlHint(pPager->fd, SQLITE_FCNTL_SIZE_HINT, &szFile);

8
src/pragma.c
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@@ -774,11 +774,15 @@ void sqlite3Pragma(
} }
} }
sz = -1; sz = -1;
if( sqlite3_file_control(db,zDb,SQLITE_FCNTL_MMAP_SIZE,&sz)==SQLITE_OK ){ rc = sqlite3_file_control(db, zDb, SQLITE_FCNTL_MMAP_SIZE, &sz);
#if SQLITE_MAX_MMAP_SIZE==0 #if SQLITE_MAX_MMAP_SIZE==0
sz = 0; sz = 0;
#endif #endif
if( rc==SQLITE_OK ){
returnSingleInt(pParse, "mmap_size", sz); returnSingleInt(pParse, "mmap_size", sz);
}else if( rc!=SQLITE_NOTFOUND ){
pParse->nErr++;
pParse->rc = rc;
} }
}else }else