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| author | Takashi Yano via Cygwin-patches <cygwin-patches@cygwin.com> | 2021-01-28 23:11:33 +0900 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2021-02-01 10:54:04 +0100 |
| commit | f186f61d60b342c8167e652073bdc6e3f704a90a (patch) | |
| tree | 3ba256c70a229c64a96ad5ea3c02a5cd722a13bc | |
| parent | 0b64cc6812e054dbc09cc1ee82b6582d4b5205e8 (diff) | |
| download | cygnal-f186f61d60b342c8167e652073bdc6e3f704a90a.tar.gz cygnal-f186f61d60b342c8167e652073bdc6e3f704a90a.tar.bz2 cygnal-f186f61d60b342c8167e652073bdc6e3f704a90a.zip | |
Cygwin: pty: Make slave read() thread-safe.
- Currently slave read() is somehow not thread-safe. This patch
fixes the issue.
| -rw-r--r-- | winsup/cygwin/fhandler_tty.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc index 06fc19ac2..48b89ae77 100644 --- a/winsup/cygwin/fhandler_tty.cc +++ b/winsup/cygwin/fhandler_tty.cc @@ -1241,6 +1241,7 @@ fhandler_pty_slave::read (void *ptr, size_t& len) time_to_wait = !vtime ? INFINITE : 100 * vtime; } +wait_retry: while (len) { switch (cygwait (input_available_event, time_to_wait)) @@ -1319,6 +1320,11 @@ fhandler_pty_slave::read (void *ptr, size_t& len) } goto out; } + if (!IsEventSignalled (input_available_event)) + { /* Maybe another thread has processed input. */ + ReleaseMutex (input_mutex); + goto wait_retry; + } if (!bytes_available (bytes_in_pipe)) { |