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Performance improvement in sqlite3TableLock().

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FossilOrigin-Name: 0d77e371c47107f67550e9bedfd26808fcfd84c7473f94b6053f75f0e3463c73
This commit is contained in:
drh 2021-05-17 11:19:32 +00:00
parent 2454e4a901
commit 9430506df0
3 changed files with 19 additions and 10 deletions
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@ -1,5 +1,5 @@
C Performance\soptimization\sin\sthe\smemory\sallocation\sof\sallocateCursor.
D 2021-05-15T19:36:36.998
C Performance\simprovement\sin\ssqlite3TableLock().
D 2021-05-17T11:19:32.196
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -487,7 +487,7 @@ F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
F src/btree.c f74511a1476175a734221d38e33638b6fc4c6c94c819bbfa8419824703b967da
F src/btree.h 096cc53baa58be22b02c896d1cf933c38cfc6d65f9253c1367ece8cc88a24de5
F src/btreeInt.h 7bc15a24a02662409ebcd6aeaa1065522d14b7fda71573a2b0568b458f514ae0
F src/build.c a7866beda66a7c8971e013674c7f659d19977d9ad51e11032479b1f754d1ef21
F src/build.c 4e13b92f77d3f6dc1285c3636a2ba7c6af5cbb793e52075a762fbcebcd36e968
F src/callback.c d0b853dd413255d2e337b34545e54d888ea02f20da5ad0e63585b389624c4a6c
F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
F src/ctime.c 2a322b9a3d75771fb4d99e0702851f4f68dda982507a0f798eefb0712969a410
@ -1913,7 +1913,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P c4e02619a4dc8b07f658e7c88011991a086eb1e760d920b9024a11437daaabfd
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R 49f4093e56e27024e4b9b5507fcc332a
U drh
Z c8321cc153d7e5ab49215db310f82cea
Z 08c2b8c4a4858391c43042a8ccf90e53

2
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@ -1 +1 @@
9d16323d14370b737399eb52b69b70cc614f78fb8a1e93f21a348c34a30dd456
0d77e371c47107f67550e9bedfd26808fcfd84c7473f94b6053f75f0e3463c73

15
src/build.c
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@ -46,7 +46,7 @@ struct TableLock {
** code to make the lock occur is generated by a later call to
** codeTableLocks() which occurs during sqlite3FinishCoding().
*/
void sqlite3TableLock(
static SQLITE_NOINLINE void lockTable(
Parse *pParse, /* Parsing context */
int iDb, /* Index of the database containing the table to lock */
Pgno iTab, /* Root page number of the table to be locked */
@ -59,8 +59,6 @@ void sqlite3TableLock(
TableLock *p;
assert( iDb>=0 );
if( iDb==1 ) return;
if( !sqlite3BtreeSharable(pParse->db->aDb[iDb].pBt) ) return;
pToplevel = sqlite3ParseToplevel(pParse);
for(i=0; i<pToplevel->nTableLock; i++){
p = &pToplevel->aTableLock[i];
@ -84,6 +82,17 @@ void sqlite3TableLock(
sqlite3OomFault(pToplevel->db);
}
}
void sqlite3TableLock(
Parse *pParse, /* Parsing context */
int iDb, /* Index of the database containing the table to lock */
Pgno iTab, /* Root page number of the table to be locked */
u8 isWriteLock, /* True for a write lock */
const char *zName /* Name of the table to be locked */
){
if( iDb==1 ) return;
if( !sqlite3BtreeSharable(pParse->db->aDb[iDb].pBt) ) return;
lockTable(pParse, iDb, iTab, isWriteLock, zName);
}
/*
** Code an OP_TableLock instruction for each table locked by the