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Detect success before errors in vPortCPUReleaseMutex. Shaves off another half uS.

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This commit is contained in:
Jeroen Domburg 2016-10-17 18:49:19 +08:00
parent c03549e117
commit 6a7ec425cb
1 changed files with 13 additions and 10 deletions
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23
components/freertos/port.c
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@ -363,27 +363,30 @@ portBASE_TYPE vPortCPUReleaseMutex(portMUX_TYPE *mux) {
res=portMUX_FREE_VAL;
uxPortCompareSet(&mux->mux, (xPortGetCoreID()<<portMUX_VAL_SHIFT)|portMUX_MAGIC_VAL, &res);
if ( res == portMUX_FREE_VAL ) {
if ( ((res&portMUX_VAL_MASK)>>portMUX_VAL_SHIFT) == xPortGetCoreID() ) {
//Lock is valid, we can return safely. Just need to check if it's a recursive lock; if so we need to decrease the refcount.
if ( ((res&portMUX_CNT_MASK)>>portMUX_CNT_SHIFT)!=0) {
//We locked this, but the reccount isn't zero. Decrease refcount and continue.
recCnt=(res&portMUX_CNT_MASK)>>portMUX_CNT_SHIFT;
recCnt--;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG_RECURSIVE
ets_printf("Recursive unlock: recCnt=%d last locked %s line %d, curr %s line %d\n", recCnt, lastLockedFn, lastLockedLine, fnName, line);
#endif
mux->mux=portMUX_MAGIC_VAL|(recCnt<<portMUX_CNT_SHIFT)|(xPortGetCoreID()<<portMUX_VAL_SHIFT);
}
} else if ( res == portMUX_FREE_VAL ) {
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p was already unlocked!\n", mux);
ets_printf("Last non-recursive unlock %s line %d, curr unlock %s line %d\n", lastLockedFn, lastLockedLine, fnName, line);
#endif
ret=pdFALSE;
} else if ( ((res&portMUX_VAL_MASK)>>portMUX_VAL_SHIFT) != xPortGetCoreID() ) {
} else {
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
ets_printf("ERROR: vPortCPUReleaseMutex: mux %p wasn't locked by this core (%d) but by core %d (ret=%x, mux=%x).\n", mux, xPortGetCoreID(), ((res&portMUX_VAL_MASK)>>portMUX_VAL_SHIFT), res, mux->mux);
ets_printf("Last non-recursive lock %s line %d\n", lastLockedFn, lastLockedLine);
ets_printf("Called by %s line %d\n", fnName, line);
#endif
ret=pdFALSE;
} else if ( ((res&portMUX_CNT_MASK)>>portMUX_CNT_SHIFT)!=0) {
//We locked this, but the reccount isn't zero. Decrease refcount and continue.
recCnt=(res&portMUX_CNT_MASK)>>portMUX_CNT_SHIFT;
recCnt--;
#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG_RECURSIVE
ets_printf("Recursive unlock: recCnt=%d last locked %s line %d, curr %s line %d\n", recCnt, lastLockedFn, lastLockedLine, fnName, line);
#endif
mux->mux=portMUX_MAGIC_VAL|(recCnt<<portMUX_CNT_SHIFT)|(xPortGetCoreID()<<portMUX_VAL_SHIFT);
}
portEXIT_CRITICAL_NESTED(irqStatus);
return ret;