Bug #8985 Updated: shm_put_var wont put the given var into memory

ID: 8985 Updated by: lobbin Reported By: fuf@mobil.cz Old Status: Open Status: Feedback Bug Type: Semaphore related Operating System: linux-2.2.18 PHP Version: 4.0.4pl1 New Comment: Have you tried this with 4.1.1? Previous Comments: ------------------------------------------------------------------------ [2001-01-29 12:27:07] fuf@mobil.cz hello, this is the same bug as described in #7046. a call to shm_put_var() returns true all the time, but checking whether the variable has been _really_ stored reveals that it hasn't. this doesn't happen on my 1 cpu box (i can't reproduce it however much i try), but on a loaded server with 4 cpus it happens pretty often. of course i call sem_acquire() before writing the variable into the shared memory, so it should be safe. i can supply the whole source in which this happens (445 lines) but basically it's just list this: $semid = sem_get($sem_key, 1); sem_acquire($semid); $var = shm_get_var($shmid, $var_key); // $var is an array // some change to $var, $var is still an array shm_put_var($shmid, $var_key, $var); if(!is_array(shm_get_var($shmid, $var_key))) echo "failed to write \$var :(\n"; sem_release($semid); could the problem be caused by the true multitasking on the 4 cpu server? thanks for any help with this, Michal Vitecek ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=8985&edit=1