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Multithreaded locking fixes.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4692 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-06-07 20:50:51 +00:00
parent 0a878c4760
commit d597536303
10 changed files with 447 additions and 237 deletions
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16
linux-user/mmap.c
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@ -46,6 +46,22 @@ void mmap_unlock(void)
pthread_mutex_unlock(&mmap_mutex);
}
}
/* Grab lock to make sure things are in a consistent state after fork(). */
void mmap_fork_start(void)
{
if (mmap_lock_count)
abort();
pthread_mutex_lock(&mmap_mutex);
}
void mmap_fork_end(int child)
{
if (child)
pthread_mutex_init(&mmap_mutex, NULL);
else
pthread_mutex_unlock(&mmap_mutex);
}
#else
/* We aren't threadsafe to start with, so no need to worry about locking. */
void mmap_lock(void)