As reported in bug 1087114 the semaphores fallback code is broken which
results in QEMU crashing and making QEMU unusable.
This patch is from Paolo.
This needs to be back ported to the 1.3 stable tree as well.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brad Smith <brad@comstyle.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Disable the semaphores fallback code for OpenBSD as modern OpenBSD
releases now have sem_timedwait().
Signed-off-by: Brad Smith <brad@comstyle.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
OpenBSD and Darwin do not have sem_timedwait. Implement a fallback
for them.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The new thread pool will use semaphores instead of condition
variables, because QemuCond does not have qemu_cond_timedwait.
(I also like it more this way).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
qemu_cpu_is_self(), passing the return value through, will later be
adapted to return bool as well.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Allow to control if a QEMU thread is created joinable or not. Make it
not joinable by default to avoid that we keep the associated resources
around when terminating a thread without joining it (what we couldn't do
so far for obvious reasons).
The audio subsystem will need the join feature when converting it to
QEMU threading/locking abstractions, so provide that service.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Split from Jan's original qemu-thread-posix.c patch. No semantic change,
just introduce the new API that POSIX and Win32 implementations will
conform to.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Makes it easier to catch the bug in gdb as there is no need to set an
explicit breakpoint.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
qemu_mutex_timedlock() and qemu_cond_timedwait() are no longer used.
Remove them and their helper timespec_add_ms().
Reported-by: François Revol <revol@free.fr>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
These are already present in the Win32 implementation, add them to
the pthread wrappers as well. Use PTHREAD_MUTEX_ERRORCHECK for mutex
operations. Later we'll add tracking of the owner for cond_signal/broadcast.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
For now, qemu_cond_timedwait and qemu_mutex_timedlock are left as
POSIX-only functions. They can be removed later, once the patches
that remove their uses are in.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
