From 7ed9dbafdbc724c1030404f29678559134de559b Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 1 Oct 2012 09:36:37 +0200 Subject: libxcb mesa pixman xkeyboard-config git update 1 oct 2012 libxcb: 23911a707b8845bff52cd7853fc5d59fb0823cef mesa: c321b1bef15e2807de3f6225c4abcbf48969997a pixman: 183afcf1d95625a1f237ef349a1c8931d94d000d xkeyboard-config: 159e8db2a3829a11801d06cc6cad6d1378551dd5 --- libxcb/src/man/.gitignore | 3 +++ libxcb/src/xcb_conn.c | 14 ++++++++++++-- 2 files changed, 15 insertions(+), 2 deletions(-) create mode 100644 libxcb/src/man/.gitignore (limited to 'libxcb') diff --git a/libxcb/src/man/.gitignore b/libxcb/src/man/.gitignore new file mode 100644 index 000000000..b36be7f44 --- /dev/null +++ b/libxcb/src/man/.gitignore @@ -0,0 +1,3 @@ +*.3 +!xcb-examples.3 +!xcb-requests.3 diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c index e01d56682..6a7a8060a 100644 --- a/libxcb/src/xcb_conn.c +++ b/libxcb/src/xcb_conn.c @@ -432,10 +432,20 @@ int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vec if(ret) { + /* The code allows two threads to call select()/poll() at the same time. + * First thread just wants to read, a second thread wants to write, too. + * We have to make sure that we don't steal the reading thread's reply + * and let it get stuck in select()/poll(). + * So a thread may read if either: + * - There is no other thread that wants to read (the above situation + * did not occur). + * - It is the reading thread (above situation occurred). + */ + int may_read = c->in.reading == 1 || !count; #if USE_POLL - if((fd.revents & POLLIN) == POLLIN) + if(may_read && (fd.revents & POLLIN) == POLLIN) #else - if(FD_ISSET(c->fd, &rfds)) + if(may_read && FD_ISSET(c->fd, &rfds)) #endif ret = ret && _xcb_in_read(c); -- cgit v1.2.3