win32: pthread: avoid using TLS, simplify pthread_t

Don't use __thread, which requires heavy runtime in some cases (such as
MinGW-w64, at least under some configurations, forcing you to link to
its pthread runtime DLL).

The pthread_t struct was needed over a simple thread ID, because
pthread_join() needed to access some sort of context from pthread_t.
Further, pthread_exit() and pthread_detach() need the context of the
current thread, for which we relied on TLS.

Replace these uses by a global thread array. This includes all threads
created by the thread wrapper. Hopefully the number of threads created
by mpv is low (say, below 20), and threads are not that often created or
destroyed. So just keeping them in an array with linear search lookup
should be reasonable.

0 files changed, 0 insertions, 0 deletions