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Simplify. Should also be more efficient.

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(LwpSigCheck): New.
(lwpCatchAwaitedSig): Set it.
(lwpSigWait): Clear it.
(lwpSigWakeup): Test it.
(lwpSigWakeup): Unblock LwpSigWaiter without testing LwpSigCatched.
(lwpSigWait): Test LwpSigCatched after wakeup.
(LwpSigAwaited, LwpSigPtr): Remove.
This commit is contained in:
Markus Armbruster 2007-01-31 20:23:07 +00:00
parent 3788676530
commit fe2de3d743
1 changed files with 14 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/lib/lwp/sig.c
View file

@ -28,7 +28,7 @@
* sig.c: Wait for signals
*
* Known contributors to this file:
* Markus Armbruster, 2006
* Markus Armbruster, 2006-2007
*/
#include <config.h>
@ -38,21 +38,20 @@
#include "lwp.h"
#include "lwpint.h"
/* Signals awaited by lwpSigWait() */
static sigset_t *LwpSigAwaited;
/*
* Signals from LwpSigAwaited catched so far
* Signals catched so far.
* Access only with signals blocked!
*/
static sigset_t LwpSigCatched;
/*
* LwpSigCatched changed since last
*/
static sig_atomic_t LwpSigCheck;
/* The thread waiting for signals in lwpSigWait() */
static struct lwpProc *LwpSigWaiter;
/* Where to return the signal number to the thread in lwpSigWait() */
static int *LwpSigPtr;
static void lwpCatchAwaitedSig(int);
/*
@ -80,6 +79,7 @@ static void
lwpCatchAwaitedSig(int sig)
{
sigaddset(&LwpSigCatched, sig);
LwpSigCheck = 1;
}
/*
@ -119,14 +119,14 @@ lwpSigWait(sigset_t *set, int *sig)
if (CANT_HAPPEN(LwpSigWaiter))
return EBUSY;
for (;;) {
LwpSigCheck = 0;
res = lwpGetSig(set);
if (res <= 0) {
if (res > 0)
break;
lwpStatus(LwpCurrent, "Waiting for signals");
LwpSigAwaited = set;
LwpSigPtr = sig;
LwpSigWaiter = LwpCurrent;
lwpReschedule();
return 0;
}
*sig = res;
return 0;
@ -139,13 +139,7 @@ lwpSigWait(sigset_t *set, int *sig)
void
lwpSigWakeup(void)
{
int res;
if (!LwpSigWaiter)
return;
res = lwpGetSig(LwpSigAwaited);
if (res > 0) {
*LwpSigPtr = res;
if (LwpSigWaiter && LwpSigCheck) {
lwpReady(LwpSigWaiter);
LwpSigWaiter = NULL;
}