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sleep/wakeup macros was designed to do it on random address in the stack.

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This random address can be matched (with some probability) with another
sleep addresses from other drivers, which can cause strange sleep/wakeup
sequence. Rewrite this ugly code to do the right thing.
This commit is contained in:
ache 1996-01-16 06:07:09 +00:00
parent 2f055e7f0f
commit ad0738fce4
1 changed files with 3 additions and 4 deletions
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7
sys/i386/isa/sound/os.h
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@ -188,16 +188,15 @@ struct snd_wait {
*/
#define DO_SLEEP(q, f, time_limit) \
{ \
int flag, chn; \
int flag; \
f.mode = WK_SLEEP; \
q = &chn; \
flag=tsleep((caddr_t) &chn, (PRIBIO-5)|PCATCH, "sndint", time_limit); \
flag=tsleep((caddr_t) &q, (PRIBIO-5)|PCATCH, "sndint", time_limit); \
if(flag == ERESTART) f.aborting = 1;\
else f.aborting = 0;\
f.mode &= ~WK_SLEEP; \
}
/* An the following wakes up a process */
#define WAKE_UP(q, f) {f.mode = WK_WAKEUP;wakeup((caddr_t) q);}
#define WAKE_UP(q, f) {f.mode = WK_WAKEUP;wakeup((caddr_t) &q);}
/*
* Timing macros. This driver assumes that there is a timer running in the