/* Stuff that reads stuff from the server. */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include "xcb.h"
#include "xcbext.h"
#include "xcbint.h"
-
-#define XCBError 0
-#define XCBReply 1
+#if USE_POLL
+#include <poll.h>
+#endif
+#ifndef _WIN32
+#include <sys/select.h>
+#include <sys/socket.h>
+#endif
+
+#ifdef _WIN32
+#include "xcb_windefs.h"
+#endif /* _WIN32 */
+
+#define XCB_ERROR 0
+#define XCB_REPLY 1
+#define XCB_XGE_EVENT 35
struct event_list {
- XCBGenericEvent *event;
+ xcb_generic_event_t *event;
struct event_list *next;
};
+struct xcb_special_event {
+
+ struct xcb_special_event *next;
+
+ /* Match XGE events for the specific extension and event ID (the
+ * first 32 bit word after evtype)
+ */
+ uint8_t extension;
+ uint32_t eid;
+ uint32_t *stamp;
+
+ struct event_list *events;
+ struct event_list **events_tail;
+
+ pthread_cond_t special_event_cond;
+};
+
struct reply_list {
void *reply;
struct reply_list *next;
};
typedef struct pending_reply {
- unsigned int request;
+ uint64_t first_request;
+ uint64_t last_request;
enum workarounds workaround;
int flags;
struct pending_reply *next;
} pending_reply;
typedef struct reader_list {
- unsigned int request;
+ uint64_t request;
pthread_cond_t *data;
struct reader_list *next;
} reader_list;
-static void wake_up_next_reader(XCBConnection *c)
+static void remove_finished_readers(reader_list **prev_reader, uint64_t completed)
{
- int pthreadret;
- if(c->in.readers)
- pthreadret = pthread_cond_signal(c->in.readers->data);
- else
- pthreadret = pthread_cond_signal(&c->in.event_cond);
- assert(pthreadret == 0);
+ while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, completed))
+ {
+ /* If you don't have what you're looking for now, you never
+ * will. Wake up and leave me alone. */
+ pthread_cond_signal((*prev_reader)->data);
+ *prev_reader = (*prev_reader)->next;
+ }
}
-static int read_packet(XCBConnection *c)
+#if HAVE_SENDMSG
+static int read_fds(xcb_connection_t *c, int *fds, int nfd)
+{
+ int *ifds = &c->in.in_fd.fd[c->in.in_fd.ifd];
+ int infd = c->in.in_fd.nfd - c->in.in_fd.ifd;
+
+ if (nfd > infd)
+ return 0;
+ memcpy(fds, ifds, nfd * sizeof (int));
+ c->in.in_fd.ifd += nfd;
+ return 1;
+}
+#endif
+
+typedef struct xcb_ge_special_event_t {
+ uint8_t response_type; /**< */
+ uint8_t extension; /**< */
+ uint16_t sequence; /**< */
+ uint32_t length; /**< */
+ uint16_t evtype; /**< */
+ uint8_t pad0[2]; /**< */
+ uint32_t eid; /**< */
+ uint8_t pad1[16]; /**< */
+} xcb_ge_special_event_t;
+
+static int event_special(xcb_connection_t *c,
+ struct event_list *event)
{
- XCBGenericRep genrep;
- int length = 32;
+ struct xcb_special_event *special_event;
+ struct xcb_ge_special_event_t *ges = (void *) event->event;
+
+ /* Special events are always XGE events */
+ if ((ges->response_type & 0x7f) != XCB_XGE_EVENT)
+ return 0;
+
+ for (special_event = c->in.special_events;
+ special_event;
+ special_event = special_event->next)
+ {
+ if (ges->extension == special_event->extension &&
+ ges->eid == special_event->eid)
+ {
+ *special_event->events_tail = event;
+ special_event->events_tail = &event->next;
+ if (special_event->stamp)
+ ++(*special_event->stamp);
+ pthread_cond_signal(&special_event->special_event_cond);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int read_packet(xcb_connection_t *c)
+{
+ xcb_generic_reply_t genrep;
+ uint64_t length = 32;
+ uint64_t eventlength = 0; /* length after first 32 bytes for GenericEvents */
+ int nfd = 0; /* Number of file descriptors attached to the reply */
+ uint64_t bufsize;
void *buf;
pending_reply *pend = 0;
struct event_list *event;
memcpy(&genrep, c->in.queue, sizeof(genrep));
/* Compute 32-bit sequence number of this packet. */
- if((genrep.response_type & 0x7f) != XCBKeymapNotify)
+ if((genrep.response_type & 0x7f) != XCB_KEYMAP_NOTIFY)
{
- int lastread = c->in.request_read;
- c->in.request_read = (lastread & 0xffff0000) | genrep.sequence;
- if(c->in.request_read < lastread)
+ uint64_t lastread = c->in.request_read;
+ c->in.request_read = (lastread & UINT64_C(0xffffffffffff0000)) | genrep.sequence;
+ if(XCB_SEQUENCE_COMPARE(c->in.request_read, <, lastread))
c->in.request_read += 0x10000;
- if(c->in.request_read > c->in.request_expected)
+ if(XCB_SEQUENCE_COMPARE(c->in.request_read, >, c->in.request_expected))
c->in.request_expected = c->in.request_read;
if(c->in.request_read != lastread)
}
c->in.request_completed = c->in.request_read - 1;
}
- if(genrep.response_type != XCBReply) /* error or event */
- c->in.request_completed = c->in.request_read; /* XXX: does event/error imply no more replies? */
- while(c->in.pending_replies && c->in.pending_replies->request <= c->in.request_completed)
+ while(c->in.pending_replies &&
+ c->in.pending_replies->workaround != WORKAROUND_EXTERNAL_SOCKET_OWNER &&
+ XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed))
{
pending_reply *oldpend = c->in.pending_replies;
c->in.pending_replies = oldpend->next;
c->in.pending_replies_tail = &c->in.pending_replies;
free(oldpend);
}
+
+ if(genrep.response_type == XCB_ERROR)
+ c->in.request_completed = c->in.request_read;
+
+ remove_finished_readers(&c->in.readers, c->in.request_completed);
}
- if(genrep.response_type == XCBError || genrep.response_type == XCBReply)
+ if(genrep.response_type == XCB_ERROR || genrep.response_type == XCB_REPLY)
{
pend = c->in.pending_replies;
- if(pend && pend->request != c->in.request_read)
+ if(pend &&
+ !(XCB_SEQUENCE_COMPARE(pend->first_request, <=, c->in.request_read) &&
+ (pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER ||
+ XCB_SEQUENCE_COMPARE(c->in.request_read, <=, pend->last_request))))
pend = 0;
}
/* For reply packets, check that the entire packet is available. */
- if(genrep.response_type == XCBReply)
+ if(genrep.response_type == XCB_REPLY)
{
if(pend && pend->workaround == WORKAROUND_GLX_GET_FB_CONFIGS_BUG)
{
- CARD32 *p = (CARD32 *) c->in.queue;
+ uint32_t *p = (uint32_t *) c->in.queue;
genrep.length = p[2] * p[3] * 2;
}
length += genrep.length * 4;
+
+ /* XXX a bit of a hack -- we "know" that all FD replys place
+ * the number of fds in the pad0 byte */
+ if (pend && pend->flags & XCB_REQUEST_REPLY_FDS)
+ nfd = genrep.pad0;
}
- buf = malloc(length + (genrep.response_type == XCBReply ? 0 : sizeof(CARD32)));
+ /* XGE events may have sizes > 32 */
+ if ((genrep.response_type & 0x7f) == XCB_XGE_EVENT)
+ eventlength = genrep.length * 4;
+
+ bufsize = length + eventlength + nfd * sizeof(int) +
+ (genrep.response_type == XCB_REPLY ? 0 : sizeof(uint32_t));
+ if (bufsize < INT32_MAX)
+ buf = malloc((size_t) bufsize);
+ else
+ buf = NULL;
if(!buf)
+ {
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_MEM_INSUFFICIENT);
return 0;
+ }
+
if(_xcb_in_read_block(c, buf, length) <= 0)
{
free(buf);
return 0;
}
+
+ /* pull in XGE event data if available, append after event struct */
+ if (eventlength)
+ {
+ if(_xcb_in_read_block(c, &((xcb_generic_event_t*)buf)[1], eventlength) <= 0)
+ {
+ free(buf);
+ return 0;
+ }
+ }
+
+#if HAVE_SENDMSG
+ if (nfd)
+ {
+ if (!read_fds(c, (int *) &((char *) buf)[length], nfd))
+ {
+ free(buf);
+ return 0;
+ }
+ }
+#endif
+
if(pend && (pend->flags & XCB_REQUEST_DISCARD_REPLY))
{
free(buf);
return 1;
}
- if(genrep.response_type != XCBReply)
- ((XCBGenericEvent *) buf)->full_sequence = c->in.request_read;
+ if(genrep.response_type != XCB_REPLY)
+ ((xcb_generic_event_t *) buf)->full_sequence = c->in.request_read;
/* reply, or checked error */
- if( genrep.response_type == XCBReply ||
- (genrep.response_type == XCBError && pend && (pend->flags & XCB_REQUEST_CHECKED)))
+ if( genrep.response_type == XCB_REPLY ||
+ (genrep.response_type == XCB_ERROR && pend && (pend->flags & XCB_REQUEST_CHECKED)))
{
- reader_list *reader;
struct reply_list *cur = malloc(sizeof(struct reply_list));
if(!cur)
+ {
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_MEM_INSUFFICIENT);
+ free(buf);
return 0;
+ }
cur->reply = buf;
cur->next = 0;
*c->in.current_reply_tail = cur;
c->in.current_reply_tail = &cur->next;
- for(reader = c->in.readers; reader && reader->request <= c->in.request_read; reader = reader->next)
- if(reader->request == c->in.request_read)
- {
- pthread_cond_signal(reader->data);
- break;
- }
+ if(c->in.readers && c->in.readers->request == c->in.request_read)
+ pthread_cond_signal(c->in.readers->data);
return 1;
}
event = malloc(sizeof(struct event_list));
if(!event)
{
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_MEM_INSUFFICIENT);
free(buf);
return 0;
}
event->event = buf;
event->next = 0;
- *c->in.events_tail = event;
- c->in.events_tail = &event->next;
- pthread_cond_signal(&c->in.event_cond);
+
+ if (!event_special(c, event)) {
+ *c->in.events_tail = event;
+ c->in.events_tail = &event->next;
+ pthread_cond_signal(&c->in.event_cond);
+ }
return 1; /* I have something for you... */
}
-static XCBGenericEvent *get_event(XCBConnection *c)
+static xcb_generic_event_t *get_event(xcb_connection_t *c)
{
struct event_list *cur = c->in.events;
- XCBGenericEvent *ret;
+ xcb_generic_event_t *ret;
if(!c->in.events)
return 0;
ret = cur->event;
}
}
-static int read_block(const int fd, void *buf, const size_t len)
+static int read_block(const int fd, void *buf, const ssize_t len)
{
int done = 0;
while(done < len)
{
- int ret = read(fd, ((char *) buf) + done, len - done);
+ int ret = recv(fd, ((char *) buf) + done, len - done, 0);
if(ret > 0)
done += ret;
+#ifndef _WIN32
if(ret < 0 && errno == EAGAIN)
+#else
+ if(ret == SOCKET_ERROR && WSAGetLastError() == WSAEWOULDBLOCK)
+#endif /* !_Win32 */
{
+#if USE_POLL
+ struct pollfd pfd;
+ pfd.fd = fd;
+ pfd.events = POLLIN;
+ pfd.revents = 0;
+ do {
+ ret = poll(&pfd, 1, -1);
+ } while (ret == -1 && errno == EINTR);
+#else
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
+
+ /* Initializing errno here makes sure that for Win32 this loop will execute only once */
+ errno = 0;
do {
ret = select(fd + 1, &fds, 0, 0, 0);
} while (ret == -1 && errno == EINTR);
+#endif /* USE_POLL */
}
if(ret <= 0)
return ret;
return len;
}
-static int poll_for_reply(XCBConnection *c, unsigned int request, void **reply, XCBGenericError **error)
+static int poll_for_reply(xcb_connection_t *c, uint64_t request, void **reply, xcb_generic_error_t **error)
{
struct reply_list *head;
+ /* If an error occurred when issuing the request, fail immediately. */
if(!request)
head = 0;
- else if(c->in.request_completed >= request)
+ /* We've read requests past the one we want, so if it has replies we have
+ * them all and they're in the replies map. */
+ else if(XCB_SEQUENCE_COMPARE(request, <, c->in.request_read))
{
head = _xcb_map_remove(c->in.replies, request);
if(head && head->next)
_xcb_map_put(c->in.replies, request, head->next);
}
- else if(c->in.request_read == request && c->in.current_reply)
+ /* We're currently processing the responses to the request we want, and we
+ * have a reply ready to return. So just return it without blocking. */
+ else if(request == c->in.request_read && c->in.current_reply)
{
head = c->in.current_reply;
c->in.current_reply = head->next;
if(!head->next)
c->in.current_reply_tail = &c->in.current_reply;
}
+ /* We know this request can't have any more replies, and we've already
+ * established it doesn't have a reply now. Don't bother blocking. */
+ else if(request == c->in.request_completed)
+ head = 0;
+ /* We may have more replies on the way for this request: block until we're
+ * sure. */
else
- /* Would block: do nothing. */
return 0;
if(error)
if(head)
{
- if(((XCBGenericRep *) head->reply)->response_type == XCBError)
+ if(((xcb_generic_reply_t *) head->reply)->response_type == XCB_ERROR)
{
if(error)
*error = head->reply;
return 1;
}
-/* Public interface */
+static void insert_reader(reader_list **prev_reader, reader_list *reader, uint64_t request, pthread_cond_t *cond)
+{
+ while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, request))
+ prev_reader = &(*prev_reader)->next;
+ reader->request = request;
+ reader->data = cond;
+ reader->next = *prev_reader;
+ *prev_reader = reader;
+}
-void *XCBWaitForReply(XCBConnection *c, unsigned int request, XCBGenericError **e)
+static void remove_reader(reader_list **prev_reader, reader_list *reader)
+{
+ while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, reader->request))
+ if(*prev_reader == reader)
+ {
+ *prev_reader = (*prev_reader)->next;
+ break;
+ }
+}
+
+static void *wait_for_reply(xcb_connection_t *c, uint64_t request, xcb_generic_error_t **e)
{
- pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
- reader_list reader;
- reader_list **prev_reader;
- struct reply_list *head;
void *ret = 0;
+
+ /* If this request has not been written yet, write it. */
+ if(c->out.return_socket || _xcb_out_flush_to(c, request))
+ {
+ pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+ reader_list reader;
+
+ insert_reader(&c->in.readers, &reader, request, &cond);
+
+ while(!poll_for_reply(c, request, &ret, e))
+ if(!_xcb_conn_wait(c, &cond, 0, 0))
+ break;
+
+ remove_reader(&c->in.readers, &reader);
+ pthread_cond_destroy(&cond);
+ }
+
+ _xcb_in_wake_up_next_reader(c);
+ return ret;
+}
+
+static uint64_t widen(xcb_connection_t *c, unsigned int request)
+{
+ uint64_t widened_request = (c->out.request & UINT64_C(0xffffffff00000000)) | request;
+ if(widened_request > c->out.request)
+ widened_request -= UINT64_C(1) << 32;
+ return widened_request;
+}
+
+/* Public interface */
+
+void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e)
+{
+ void *ret;
if(e)
*e = 0;
-
- /* If an error occurred when issuing the request, fail immediately. */
- if(!request)
+ if(c->has_error)
return 0;
pthread_mutex_lock(&c->iolock);
+ ret = wait_for_reply(c, widen(c, request), e);
+ pthread_mutex_unlock(&c->iolock);
+ return ret;
+}
- /* If this request has not been written yet, write it. */
- if(!_xcb_out_flush_to(c, request))
- goto done; /* error */
-
- for(prev_reader = &c->in.readers; *prev_reader && (*prev_reader)->request <= request; prev_reader = &(*prev_reader)->next)
- if((*prev_reader)->request == request)
- goto done; /* error */
-
- reader.request = request;
- reader.data = &cond;
- reader.next = *prev_reader;
- *prev_reader = &reader;
-
- /* If this request has not completed yet and has no reply waiting,
- * wait for one. */
- while(c->in.request_completed < request &&
- !(c->in.request_read == request && c->in.current_reply))
- if(!_xcb_conn_wait(c, &cond, 0, 0))
- goto done;
-
- if(c->in.request_read != request)
- {
- head = _xcb_map_remove(c->in.replies, request);
- if(head && head->next)
- _xcb_map_put(c->in.replies, request, head->next);
- }
- else
+int *xcb_get_reply_fds(xcb_connection_t *c, void *reply, size_t reply_size)
+{
+ return (int *) (&((char *) reply)[reply_size]);
+}
+
+static void insert_pending_discard(xcb_connection_t *c, pending_reply **prev_next, uint64_t seq)
+{
+ pending_reply *pend;
+ pend = malloc(sizeof(*pend));
+ if(!pend)
{
- head = c->in.current_reply;
- if(head)
- {
- c->in.current_reply = head->next;
- if(!head->next)
- c->in.current_reply_tail = &c->in.current_reply;
- }
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_MEM_INSUFFICIENT);
+ return;
}
- if(head)
+ pend->first_request = seq;
+ pend->last_request = seq;
+ pend->workaround = 0;
+ pend->flags = XCB_REQUEST_DISCARD_REPLY;
+ pend->next = *prev_next;
+ *prev_next = pend;
+
+ if(!pend->next)
+ c->in.pending_replies_tail = &pend->next;
+}
+
+static void discard_reply(xcb_connection_t *c, uint64_t request)
+{
+ void *reply;
+ pending_reply **prev_pend;
+
+ /* Free any replies or errors that we've already read. Stop if
+ * xcb_wait_for_reply would block or we've run out of replies. */
+ while(poll_for_reply(c, request, &reply, 0) && reply)
+ free(reply);
+
+ /* If we've proven there are no more responses coming, we're done. */
+ if(XCB_SEQUENCE_COMPARE(request, <=, c->in.request_completed))
+ return;
+
+ /* Walk the list of pending requests. Mark the first match for deletion. */
+ for(prev_pend = &c->in.pending_replies; *prev_pend; prev_pend = &(*prev_pend)->next)
{
- ret = head->reply;
- free(head);
+ if(XCB_SEQUENCE_COMPARE((*prev_pend)->first_request, >, request))
+ break;
- if(((XCBGenericRep *) ret)->response_type == XCBError)
+ if((*prev_pend)->first_request == request)
{
- if(e)
- *e = ret;
- else
- free(ret);
- ret = 0;
+ /* Pending reply found. Mark for discard: */
+ (*prev_pend)->flags |= XCB_REQUEST_DISCARD_REPLY;
+ return;
}
}
-done:
- for(prev_reader = &c->in.readers; *prev_reader && (*prev_reader)->request <= request; prev_reader = &(*prev_reader)->next)
- if(*prev_reader == &reader)
- {
- *prev_reader = (*prev_reader)->next;
- break;
- }
- pthread_cond_destroy(&cond);
+ /* Pending reply not found (likely due to _unchecked request). Create one: */
+ insert_pending_discard(c, prev_pend, request);
+}
- wake_up_next_reader(c);
+void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence)
+{
+ if(c->has_error)
+ return;
+
+ /* If an error occurred when issuing the request, fail immediately. */
+ if(!sequence)
+ return;
+
+ pthread_mutex_lock(&c->iolock);
+ discard_reply(c, widen(c, sequence));
pthread_mutex_unlock(&c->iolock);
- return ret;
}
-int XCBPollForReply(XCBConnection *c, unsigned int request, void **reply, XCBGenericError **error)
+int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error)
{
int ret;
+ if(c->has_error)
+ {
+ *reply = 0;
+ if(error)
+ *error = 0;
+ return 1; /* would not block */
+ }
assert(reply != 0);
pthread_mutex_lock(&c->iolock);
- ret = poll_for_reply(c, request, reply, error);
+ ret = poll_for_reply(c, widen(c, request), reply, error);
pthread_mutex_unlock(&c->iolock);
return ret;
}
-XCBGenericEvent *XCBWaitEvent(XCBConnection *c)
+xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c)
{
- return XCBWaitForEvent(c);
-}
-
-XCBGenericEvent *XCBWaitForEvent(XCBConnection *c)
-{
- XCBGenericEvent *ret;
+ xcb_generic_event_t *ret;
+ if(c->has_error)
+ return 0;
pthread_mutex_lock(&c->iolock);
/* get_event returns 0 on empty list. */
while(!(ret = get_event(c)))
if(!_xcb_conn_wait(c, &c->in.event_cond, 0, 0))
break;
- wake_up_next_reader(c);
+ _xcb_in_wake_up_next_reader(c);
pthread_mutex_unlock(&c->iolock);
return ret;
}
-XCBGenericEvent *XCBPollForEvent(XCBConnection *c, int *error)
+static xcb_generic_event_t *poll_for_next_event(xcb_connection_t *c, int queued)
{
- XCBGenericEvent *ret = 0;
- pthread_mutex_lock(&c->iolock);
- if(error)
- *error = 0;
- /* FIXME: follow X meets Z architecture changes. */
- if(_xcb_in_read(c))
+ xcb_generic_event_t *ret = 0;
+ if(!c->has_error)
+ {
+ pthread_mutex_lock(&c->iolock);
+ /* FIXME: follow X meets Z architecture changes. */
ret = get_event(c);
- else if(error)
- *error = -1;
- else
+ if(!ret && !queued && c->in.reading == 0 && _xcb_in_read(c)) /* _xcb_in_read shuts down the connection on error */
+ ret = get_event(c);
+ pthread_mutex_unlock(&c->iolock);
+ }
+ return ret;
+}
+
+xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c)
+{
+ return poll_for_next_event(c, 0);
+}
+
+xcb_generic_event_t *xcb_poll_for_queued_event(xcb_connection_t *c)
+{
+ return poll_for_next_event(c, 1);
+}
+
+xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie)
+{
+ uint64_t request;
+ xcb_generic_error_t *ret = 0;
+ void *reply;
+ if(c->has_error)
+ return 0;
+ pthread_mutex_lock(&c->iolock);
+ request = widen(c, cookie.sequence);
+ if(XCB_SEQUENCE_COMPARE(request, >=, c->in.request_expected)
+ && XCB_SEQUENCE_COMPARE(request, >, c->in.request_completed))
{
- fprintf(stderr, "XCBPollForEvent: I/O error occured, but no handler provided.\n");
- abort();
+ _xcb_out_send_sync(c);
+ _xcb_out_flush_to(c, c->out.request);
}
+ reply = wait_for_reply(c, request, &ret);
+ assert(!reply);
pthread_mutex_unlock(&c->iolock);
return ret;
}
-unsigned int XCBGetRequestRead(XCBConnection *c)
+static xcb_generic_event_t *get_special_event(xcb_connection_t *c,
+ xcb_special_event_t *se)
{
- unsigned int ret;
+ xcb_generic_event_t *event = NULL;
+ struct event_list *events;
+
+ if ((events = se->events) != NULL) {
+ event = events->event;
+ if (!(se->events = events->next))
+ se->events_tail = &se->events;
+ free (events);
+ }
+ return event;
+}
+
+xcb_generic_event_t *xcb_poll_for_special_event(xcb_connection_t *c,
+ xcb_special_event_t *se)
+{
+ xcb_generic_event_t *event;
+
+ if(c->has_error)
+ return 0;
pthread_mutex_lock(&c->iolock);
- /* FIXME: follow X meets Z architecture changes. */
- _xcb_in_read(c);
- ret = c->in.request_read;
+ event = get_special_event(c, se);
+ pthread_mutex_unlock(&c->iolock);
+ return event;
+}
+
+xcb_generic_event_t *xcb_wait_for_special_event(xcb_connection_t *c,
+ xcb_special_event_t *se)
+{
+ xcb_generic_event_t *event;
+
+ if(c->has_error)
+ return 0;
+ pthread_mutex_lock(&c->iolock);
+
+ /* get_special_event returns 0 on empty list. */
+ while(!(event = get_special_event(c, se)))
+ if(!_xcb_conn_wait(c, &se->special_event_cond, 0, 0))
+ break;
+
+ pthread_mutex_unlock(&c->iolock);
+ return event;
+}
+
+xcb_special_event_t *
+xcb_register_for_special_xge(xcb_connection_t *c,
+ xcb_extension_t *ext,
+ uint32_t eid,
+ uint32_t *stamp)
+{
+ xcb_special_event_t *se;
+ const xcb_query_extension_reply_t *ext_reply;
+
+ if(c->has_error)
+ return NULL;
+ ext_reply = xcb_get_extension_data(c, ext);
+ if (!ext_reply)
+ return NULL;
+ pthread_mutex_lock(&c->iolock);
+ for (se = c->in.special_events; se; se = se->next) {
+ if (se->extension == ext_reply->major_opcode &&
+ se->eid == eid) {
+ pthread_mutex_unlock(&c->iolock);
+ return NULL;
+ }
+ }
+ se = calloc(1, sizeof(xcb_special_event_t));
+ if (!se) {
+ pthread_mutex_unlock(&c->iolock);
+ return NULL;
+ }
+
+ se->extension = ext_reply->major_opcode;
+ se->eid = eid;
+
+ se->events = NULL;
+ se->events_tail = &se->events;
+ se->stamp = stamp;
+
+ pthread_cond_init(&se->special_event_cond, 0);
+
+ se->next = c->in.special_events;
+ c->in.special_events = se;
+ pthread_mutex_unlock(&c->iolock);
+ return se;
+}
+
+void
+xcb_unregister_for_special_event(xcb_connection_t *c,
+ xcb_special_event_t *se)
+{
+ xcb_special_event_t *s, **prev;
+ struct event_list *events, *next;
+
+ if (!se)
+ return;
+
+ if (c->has_error)
+ return;
+
+ pthread_mutex_lock(&c->iolock);
+
+ for (prev = &c->in.special_events; (s = *prev) != NULL; prev = &(s->next)) {
+ if (s == se) {
+ *prev = se->next;
+ for (events = se->events; events; events = next) {
+ next = events->next;
+ free (events->event);
+ free (events);
+ }
+ pthread_cond_destroy(&se->special_event_cond);
+ free (se);
+ break;
+ }
+ }
pthread_mutex_unlock(&c->iolock);
- return ret;
}
/* Private interface */
}
}
-int _xcb_in_expect_reply(XCBConnection *c, unsigned int request, enum workarounds workaround, int flags)
+void _xcb_in_wake_up_next_reader(xcb_connection_t *c)
+{
+ int pthreadret;
+ if(c->in.readers)
+ pthreadret = pthread_cond_signal(c->in.readers->data);
+ else
+ pthreadret = pthread_cond_signal(&c->in.event_cond);
+ assert(pthreadret == 0);
+}
+
+int _xcb_in_expect_reply(xcb_connection_t *c, uint64_t request, enum workarounds workaround, int flags)
{
- if(workaround != WORKAROUND_NONE || flags != 0)
+ pending_reply *pend = malloc(sizeof(pending_reply));
+ assert(workaround != WORKAROUND_NONE || flags != 0);
+ if(!pend)
{
- pending_reply *pend = malloc(sizeof(pending_reply));
- if(!pend)
- return 0;
- pend->request = request;
- pend->workaround = workaround;
- pend->flags = flags;
- pend->next = 0;
- *c->in.pending_replies_tail = pend;
- c->in.pending_replies_tail = &pend->next;
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_MEM_INSUFFICIENT);
+ return 0;
}
+ pend->first_request = pend->last_request = request;
+ pend->workaround = workaround;
+ pend->flags = flags;
+ pend->next = 0;
+ *c->in.pending_replies_tail = pend;
+ c->in.pending_replies_tail = &pend->next;
return 1;
}
-int _xcb_in_read(XCBConnection *c)
+void _xcb_in_replies_done(xcb_connection_t *c)
{
- int n = read(c->fd, c->in.queue + c->in.queue_len, sizeof(c->in.queue) - c->in.queue_len);
- if(n > 0)
+ struct pending_reply *pend;
+ if (c->in.pending_replies_tail != &c->in.pending_replies)
+ {
+ pend = container_of(c->in.pending_replies_tail, struct pending_reply, next);
+ if(pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER)
+ {
+ pend->last_request = c->out.request;
+ pend->workaround = WORKAROUND_NONE;
+ }
+ }
+}
+
+int _xcb_in_read(xcb_connection_t *c)
+{
+ int n;
+
+#if HAVE_SENDMSG
+ struct iovec iov = {
+ .iov_base = c->in.queue + c->in.queue_len,
+ .iov_len = sizeof(c->in.queue) - c->in.queue_len,
+ };
+ char cmsgbuf[CMSG_SPACE(sizeof(int) * XCB_MAX_PASS_FD)];
+ struct msghdr msg = {
+ .msg_name = NULL,
+ .msg_namelen = 0,
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = cmsgbuf,
+ .msg_controllen = CMSG_SPACE(sizeof(int) * (XCB_MAX_PASS_FD - c->in.in_fd.nfd)),
+ };
+ n = recvmsg(c->fd, &msg, 0);
+
+ /* Check for truncation errors. Only MSG_CTRUNC is
+ * probably possible here, which would indicate that
+ * the sender tried to transmit more than XCB_MAX_PASS_FD
+ * file descriptors.
+ */
+ if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) {
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_FDPASSING_FAILED);
+ return 0;
+ }
+#else
+ n = recv(c->fd, c->in.queue + c->in.queue_len, sizeof(c->in.queue) - c->in.queue_len, 0);
+#endif
+ if(n > 0) {
+#if HAVE_SENDMSG
+ struct cmsghdr *hdr;
+
+ for (hdr = CMSG_FIRSTHDR(&msg); hdr; hdr = CMSG_NXTHDR(&msg, hdr)) {
+ if (hdr->cmsg_level == SOL_SOCKET && hdr->cmsg_type == SCM_RIGHTS) {
+ int nfd = (hdr->cmsg_len - CMSG_LEN(0)) / sizeof (int);
+ memcpy(&c->in.in_fd.fd[c->in.in_fd.nfd], CMSG_DATA(hdr), nfd * sizeof (int));
+ c->in.in_fd.nfd += nfd;
+ }
+ }
+#endif
c->in.queue_len += n;
+ }
while(read_packet(c))
/* empty */;
- return (n > 0) || (n < 0 && errno == EAGAIN);
+#if HAVE_SENDMSG
+ if (c->in.in_fd.nfd) {
+ c->in.in_fd.nfd -= c->in.in_fd.ifd;
+ memmove(&c->in.in_fd.fd[0],
+ &c->in.in_fd.fd[c->in.in_fd.ifd],
+ c->in.in_fd.nfd * sizeof (int));
+ c->in.in_fd.ifd = 0;
+
+ /* If we have any left-over file descriptors after emptying
+ * the input buffer, then the server sent some that we weren't
+ * expecting. Close them and mark the connection as broken;
+ */
+ if (c->in.queue_len == 0 && c->in.in_fd.nfd != 0) {
+ int i;
+ for (i = 0; i < c->in.in_fd.nfd; i++)
+ close(c->in.in_fd.fd[i]);
+ _xcb_conn_shutdown(c, XCB_CONN_CLOSED_FDPASSING_FAILED);
+ return 0;
+ }
+ }
+#endif
+#ifndef _WIN32
+ if((n > 0) || (n < 0 && errno == EAGAIN))
+#else
+ if((n > 0) || (n < 0 && WSAGetLastError() == WSAEWOULDBLOCK))
+#endif /* !_WIN32 */
+ return 1;
+ _xcb_conn_shutdown(c, XCB_CONN_ERROR);
+ return 0;
}
-int _xcb_in_read_block(XCBConnection *c, void *buf, int len)
+int _xcb_in_read_block(xcb_connection_t *c, void *buf, int len)
{
int done = c->in.queue_len;
if(len < done)
{
int ret = read_block(c->fd, (char *) buf + done, len - done);
if(ret <= 0)
+ {
+ _xcb_conn_shutdown(c, XCB_CONN_ERROR);
return ret;
+ }
}
return len;
projects / free-sw / xcb / libxcb / blobdiff