liblzma: Fix another deadlock in the threaded encoder.
This race condition could cause a deadlock if lzma_end() was called before finishing the encoding. This can happen with xz with debugging enabled (non-debugging version doesn't call lzma_end() before exiting).
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@ -341,11 +341,14 @@ worker_start(void *thr_ptr)
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if (state == THR_EXIT)
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break;
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// Mark the thread as idle. Signal is needed for the case
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// Mark the thread as idle unless the main thread has
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// told us to exit. Signal is needed for the case
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// where the main thread is waiting for the threads to stop.
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mythread_sync(thr->mutex) {
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thr->state = THR_IDLE;
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pthread_cond_signal(&thr->cond);
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if (thr->state != THR_EXIT) {
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thr->state = THR_IDLE;
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pthread_cond_signal(&thr->cond);
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}
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}
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mythread_sync(thr->coder->mutex) {
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