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Move the allocation of the memsys5 mutex into the initializer.

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FossilOrigin-Name: 4e377a09c194e90581ef00fd3a213e936b4e648a
This commit is contained in:
drh 2009-08-18 15:33:44 +00:00
parent 7c6791c8b1
commit 1b25753b30
3 changed files with 21 additions and 13 deletions
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18
manifest
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@ -1,8 +1,8 @@
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
C Fix\sobscure\sissues\swith\sthe\smemsys5\smemory\sallocator.\s\sArrange\sthat\sthe\nxRealloc()\sinterface\sto\smemory\sallocators\sis\sonly\scalled\swith\sa\svalue\nthat\shas\sbeen\sthrough\sxRoundup().
D 2009-08-18T14:48:54
C Move\sthe\sallocation\sof\sthe\smemsys5\smutex\sinto\sthe\sinitializer.
D 2009-08-18T15:33:44
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in 0f7761c5d1c62ae7a841e3393ffaff1fa0f5c00a
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@ -135,7 +135,7 @@ F src/mem0.c f2f84062d1f35814d6535c9f9e33de3bfb3b132c
F src/mem1.c e6d5c23941288df8191b8a98c28e3f57771e2270
F src/mem2.c d02bd6a5b34f2d59012a852615621939d9c09548
F src/mem3.c 67153ec933e08b70714055e872efb58a6b287939
F src/mem5.c c263389579a1c42b26514f55343733f8f700dfbe
F src/mem5.c eb96124e6eb473bf3e17a678d07e46bae95f3c45
F src/memjournal.c e68cb5f7e828b84d5bf2ea16c5d87f1ed7e9fe7f
F src/mutex.c 73899d158560117c02909b6e9ffe2bad2560a817
F src/mutex.h 9e686e83a88838dac8b9c51271c651e833060f1e
@ -749,14 +749,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
P d4e7e2d82321c12fe471ed49098828bc0ef78543
R 0c7fa9d1f28b0b97b64e4538e0512b1d
P 577bd6f15556b7f6d86ee5167353fdd535577bf6
R 7a54c62e9fd97dfd56b8fffe44a0eb37
U drh
Z b14ff688d7f891db8caaf1f850a022d2
Z 6c0284c62829374caa380ff879613eb8
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2
manifest.uuid
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@ -1 +1 @@
577bd6f15556b7f6d86ee5167353fdd535577bf6
4e377a09c194e90581ef00fd3a213e936b4e648a

14
src/mem5.c
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@ -188,9 +188,6 @@ static void memsys5Link(int i, int iLogsize){
** sqlite3GlobalConfig.bMemStat is true.
*/
static void memsys5Enter(void){
if( sqlite3GlobalConfig.bMemstat==0 && mem5.mutex==0 ){
mem5.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MEM);
}
sqlite3_mutex_enter(mem5.mutex);
}
static void memsys5Leave(void){
@ -447,6 +444,9 @@ static int memsys5Log(int iValue){
/*
** Initialize the memory allocator.
**
** This routine is not threadsafe. The caller must be holding a mutex
** to prevent multiple threads from entering at the same time.
*/
static int memsys5Init(void *NotUsed){
int ii; /* Loop counter */
@ -457,6 +457,9 @@ static int memsys5Init(void *NotUsed){
UNUSED_PARAMETER(NotUsed);
/* For the purposes of this routine, disable the mutex */
mem5.mutex = 0;
/* The size of a Mem5Link object must be a power of two. Verify that
** this is case.
*/
@ -491,6 +494,11 @@ static int memsys5Init(void *NotUsed){
assert((iOffset+nAlloc)>mem5.nBlock);
}
/* If a mutex is required for normal operation, allocate one */
if( sqlite3GlobalConfig.bMemstat==0 && mem5.mutex==0 ){
mem5.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MEM);
}
return SQLITE_OK;
}