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multi-thread fix: lock each entry points with a static var

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we compare the current VP8GetCPUInfo pointer to the last used.
This is less code overall and each implementation is still
testable separately (by just changing VP8GetCPUInfo, but not
a separate threads!)

(cherry picked from commit a437694a17)

Conflicts:
	src/dsp/alpha_processing.c
	src/dsp/argb.c
	src/dsp/dec.c
	src/dsp/enc.c
	src/dsp/lossless.c
	src/dsp/upsampling.c
	src/dsp/yuv.c

Change-Id: Ia13fa8ffc4561a884508f6ab71ed0d1b9f1ce59b
This commit is contained in:
Pascal Massimino
2015-01-05 06:51:54 -08:00
committed by James Zern
parent 5c1eeda922
commit 3ae78eb757
6 changed files with 30 additions and 1 deletions
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5
src/dsp/upsampling.c
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@ -189,7 +189,11 @@ const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = {
extern void WebPInitUpsamplersSSE2(void);
extern void WebPInitUpsamplersNEON(void);
static volatile VP8CPUInfo last_cpuinfo_used2 = (VP8CPUInfo)&last_cpuinfo_used2;
void WebPInitUpsamplers(void) {
if (last_cpuinfo_used2 == VP8GetCPUInfo) return;
#ifdef FANCY_UPSAMPLING
WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair;
WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair;
@ -217,6 +221,7 @@ void WebPInitUpsamplers(void) {
#endif
}
#endif // FANCY_UPSAMPLING
last_cpuinfo_used2 = VP8GetCPUInfo;
}
//------------------------------------------------------------------------------