/* Connection management: the core of XCB. */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
+#include <limits.h>
#include "xcb.h"
#include "xcbint.h"
static const int xcb_con_error = XCB_CONN_ERROR;
static const int xcb_con_closed_mem_er = XCB_CONN_CLOSED_MEM_INSUFFICIENT;
static const int xcb_con_closed_parse_er = XCB_CONN_CLOSED_PARSE_ERR;
+static const int xcb_con_closed_screen_er = XCB_CONN_CLOSED_INVALID_SCREEN;
static int set_fd_flags(const int fd)
{
i++;
}
#else
- n = writev(c->fd, *vector, *count);
- if(n < 0 && errno == EAGAIN)
- return 1;
+ n = *count;
+ if (n > IOV_MAX)
+ n = IOV_MAX;
+
+#if HAVE_SENDMSG
+ if (c->out.out_fd.nfd) {
+ struct msghdr msg = {
+ .msg_name = NULL,
+ .msg_namelen = 0,
+ .msg_iov = *vector,
+ .msg_iovlen = n,
+ .msg_control = &c->out.out_fd,
+ .msg_controllen = sizeof (struct cmsghdr) + c->out.out_fd.nfd * sizeof (int),
+ };
+ int i;
+ c->out.out_fd.cmsghdr.cmsg_len = msg.msg_controllen;
+ c->out.out_fd.cmsghdr.cmsg_level = SOL_SOCKET;
+ c->out.out_fd.cmsghdr.cmsg_type = SCM_RIGHTS;
+ n = sendmsg(c->fd, &msg, 0);
+ if(n < 0 && errno == EAGAIN)
+ return 1;
+ for (i = 0; i < c->out.out_fd.nfd; i++)
+ close(c->out.out_fd.fd[i]);
+ c->out.out_fd.nfd = 0;
+ } else
+#endif
+ {
+ n = writev(c->fd, *vector, n);
+ if(n < 0 && errno == EAGAIN)
+ return 1;
+ }
+
#endif /* _WIN32 */
if(n <= 0)
_xcb_xid_destroy(c);
free(c);
+
+#ifdef _WIN32
+ WSACleanup();
+#endif
}
/* Private interface */
{
return (xcb_connection_t *) &xcb_con_closed_parse_er;
}
+ case XCB_CONN_CLOSED_INVALID_SCREEN:
+ {
+ return (xcb_connection_t *) &xcb_con_closed_screen_er;
+ }
case XCB_CONN_ERROR:
default:
{
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) != 0)
#else
- if(FD_ISSET(c->fd, &rfds))
+ if(may_read && FD_ISSET(c->fd, &rfds))
#endif
ret = ret && _xcb_in_read(c);
#if USE_POLL
- if((fd.revents & POLLOUT) == POLLOUT)
+ if((fd.revents & POLLOUT) != 0)
#else
if(FD_ISSET(c->fd, &wfds))
#endif