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| author | Stefan Zabka <zabkaste@hu-berlin.de> | 2020-06-12 09:40:21 +0200 |
|---|---|---|
| committer | Stefan Zabka <zabkaste@hu-berlin.de> | 2020-06-12 09:40:21 +0200 |
| commit | 329732eef0264d044cc8ce0095e8ec56589dd400 (patch) | |
| tree | 045a4942c936e982d03367e6efdf087240967c47 /04_exercise/rwlock/rwlock.c | |
| parent | 781a3f28a0f465350bf617b1f2c9ff70c0fbde9b (diff) | |
| download | betriebssysteme-329732eef0264d044cc8ce0095e8ec56589dd400.tar.gz betriebssysteme-329732eef0264d044cc8ce0095e8ec56589dd400.zip | |
Added ppmlib.h
Diffstat (limited to '04_exercise/rwlock/rwlock.c')
| -rw-r--r-- | 04_exercise/rwlock/rwlock.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/04_exercise/rwlock/rwlock.c b/04_exercise/rwlock/rwlock.c index 3de5083..941d176 100644 --- a/04_exercise/rwlock/rwlock.c +++ b/04_exercise/rwlock/rwlock.c @@ -34,6 +34,7 @@ void rwUnlockWrite(atomic_char *lock) { if(DEBUG) { fprintf(stderr, "Thread %lu: Released Write Lock \n", pthread_self() % 1000); } + // Avoid starvation of readers/all other threads if (sched_yield() < 0) { perror("Couldn't sleep. This shouldn't happen."); exit(-1); @@ -60,6 +61,7 @@ void rwUnlockRead(atomic_char *lock) { if(DEBUG) { fprintf(stderr, "Thread %lu: Released Read Lock \n", pthread_self() % 1000); } + // Avoid starvation of writer/all other threads if (sched_yield() < 0) { perror("Couldn't sleep. This shouldn't happen."); exit(-1); |