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Expand the header comment to clarify the purpose for the

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sqlite3MemoryBarrier() function.

FossilOrigin-Name: b89495ae09aa0e9652475b2ba1943dfd87c73e07
This commit is contained in:
drh
2015-09-26 03:23:29 +00:00
parent 17db155fed
commit 539482b76a
4 changed files with 14 additions and 10 deletions
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14
manifest
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@@ -1,5 +1,5 @@
C Remove\san\sassert\sin\sthe\swindows\sworker-thread\slogic\sthat\scan\sfail\sin\sa\srace\ncondition. C Expand\sthe\sheader\scomment\sto\sclarify\sthe\spurpose\sfor\sthe\nsqlite3MemoryBarrier()\sfunction.
D 2015-09-26T01:28:46.988 D 2015-09-26T03:23:29.340
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in e1afa6fb2de2bddd50e0ddae8166c2ee9d69b301 F Makefile.in e1afa6fb2de2bddd50e0ddae8166c2ee9d69b301
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -317,8 +317,8 @@ F src/msvc.h d9ba56c6851227ab44b3f228a35f3f5772296495
F src/mutex.c 8e45800ee78e0cd1f1f3fe8e398853307f4a085c F src/mutex.c 8e45800ee78e0cd1f1f3fe8e398853307f4a085c
F src/mutex.h 779d588e3b7756ec3ecf7d78cde1d84aba414f85 F src/mutex.h 779d588e3b7756ec3ecf7d78cde1d84aba414f85
F src/mutex_noop.c 9d4309c075ba9cc7249e19412d3d62f7f94839c4 F src/mutex_noop.c 9d4309c075ba9cc7249e19412d3d62f7f94839c4
F src/mutex_unix.c 8cfa6e83c618d2fcae0fe63f4d2b5bb16b11a97a F src/mutex_unix.c a94b46f3f7beba307dde1b298b0f99f9c3677a93
F src/mutex_w32.c 2e025e6642eaf27597403690980f560d1a91f62c F src/mutex_w32.c b483d3e5914b84c82516a6a9919582f12ef3b838
F src/notify.c 9711a7575036f0d3040ba61bc6e217f13a9888e7 F src/notify.c 9711a7575036f0d3040ba61bc6e217f13a9888e7
F src/os.c 8fd25588eeba74068d41102d26810e216999b6c8 F src/os.c 8fd25588eeba74068d41102d26810e216999b6c8
F src/os.h 3e57a24e2794a94d3cf2342c6d9a884888cd96bf F src/os.h 3e57a24e2794a94d3cf2342c6d9a884888cd96bf
@@ -1388,7 +1388,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
P 2d867c054d6d3e1e841ba9ca524e986bc6993ac3 P d7bfb96092a6b812af194f32b22283a0f6a7da96
R 1758ec9357330b0579141ecae96a2702 R 53a860536ab1d397fede465244d51351
U drh U drh
Z da76e4bf593addae8cb1880d2dd70b45 Z f65cf73c8cac5f871fc434c67cdccd1a

2
manifest.uuid
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@@ -1 +1 @@
d7bfb96092a6b812af194f32b22283a0f6a7da96 b89495ae09aa0e9652475b2ba1943dfd87c73e07

4
src/mutex_unix.c
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@@ -81,7 +81,9 @@ static int pthreadMutexNotheld(sqlite3_mutex *p){
#endif #endif
/* /*
** Try to provide a memory barrier operation, needed for initialization only. ** Try to provide a memory barrier operation, needed for initialization
** and also for the implementation of xShmBarrier in the VFS in cases
** where SQLite is compiled without mutexes.
*/ */
void sqlite3MemoryBarrier(void){ void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER) #if defined(SQLITE_MEMORY_BARRIER)

4
src/mutex_w32.c
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@@ -78,7 +78,9 @@ static int winMutexNotheld(sqlite3_mutex *p){
#endif #endif
/* /*
** Try to provide a memory barrier operation, needed for initialization only. ** Try to provide a memory barrier operation, needed for initialization
** and also for the xShmBarrier method of the VFS in cases when SQLite is
** compiled without mutexes (SQLITE_THREADSAFE=0).
*/ */
void sqlite3MemoryBarrier(void){ void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER) #if defined(SQLITE_MEMORY_BARRIER)