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authorGravatar Christophe Fergeau2015-07-02 17:30:53 +0200
committerGravatar Nikias Bassen2016-07-14 03:15:58 +0200
commitfc9e1764ae65b9420bc1bf8e26307c21f542357b (patch)
tree519c82f3f5a1f1925e066ace75f047a299100104 /m4/as-compiler-flag.m4
parent75c6f68dde6ddaa7b7e0579d5f62eaf0d661511b (diff)
downloadlibusbmuxd-fc9e1764ae65b9420bc1bf8e26307c21f542357b.tar.gz
libusbmuxd-fc9e1764ae65b9420bc1bf8e26307c21f542357b.tar.bz2
Report pthread_kill/pthread_join errors in usbmuxd_unsubscribe
In order to avoid race condition between an usbmuxd_event_cb_t firing in a different thread and usbmuxd_unsubscribe() being called, libusbmuxd users must assume that once usbmuxd_unsubcribe() returns, no more usbmuxd_event_cb_t callbacks will fire, but also that those which were already started when usbmuxd_unsubcribe() is called will have completed. usbmuxd_unsubcribe() tries to guarantee this, but pthread_kill/pthread_join may fail, in which case this guarantee would not hold. This commit makes sure an error is reported to the caller when we get in this situation (though I'm not really sure how the caller could handle it).
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