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glapi: Fix a race in accessing context/dispatch TSD.

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If multiple threads set/get a TSD at roughly same time for the first
time, glthread might (wrongly) initialize it more than once.  This patch
solves the race by initializing context/dispatch TSDs early.

Acked-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
This commit is contained in:
Chia-I Wu 2009-07-10 17:35:11 +08:00 • committed by Brian Paul
parent 99939982ec
commit fc2feea685
1 changed files with 4 additions and 0 deletions
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4
src/mesa/glapi/glapi.c
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@ -240,6 +240,10 @@ _glapi_check_multithread(void)
_glthread_LOCK_MUTEX(ThreadCheckMutex); _glthread_LOCK_MUTEX(ThreadCheckMutex);
if (firstCall) { if (firstCall) {
/* initialize TSDs */
(void) _glthread_GetTSD(&ContextTSD);
(void) _glthread_GetTSD(&_gl_DispatchTSD);
knownID = _glthread_GetID(); knownID = _glthread_GetID();
firstCall = GL_FALSE; firstCall = GL_FALSE;
} }