X-Git-Url: http://git.demorecorder.com/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fxcb_in.c;h=6dd358cbdd4727c7ca738e0ed27111ccf4469c1e;hb=1c590d5a86ae854e53f388e40c952e92f11d59e6;hp=2997de4c43f24e88128c6258f6fcd570ad525709;hpb=e20a31d72b8838cdf31b568431b5ad78492c1481;p=free-sw%2Fxcb%2Flibxcb diff --git a/src/xcb_in.c b/src/xcb_in.c index 2997de4..6dd358c 100644 --- a/src/xcb_in.c +++ b/src/xcb_in.c @@ -30,15 +30,20 @@ #include #include #include -#include #include #include "xcb.h" #include "xcbext.h" #include "xcbint.h" +#if USE_POLL +#include +#else +#include +#endif #define XCB_ERROR 0 #define XCB_REPLY 1 +#define XCB_XGE_EVENT 35 struct event_list { xcb_generic_event_t *event; @@ -51,7 +56,8 @@ struct reply_list { }; typedef struct pending_reply { - unsigned int request; + uint64_t first_request; + uint64_t last_request; enum workarounds workaround; int flags; struct pending_reply *next; @@ -63,20 +69,11 @@ typedef struct reader_list { struct reader_list *next; } reader_list; -static void 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); -} - static int read_packet(xcb_connection_t *c) { xcb_generic_reply_t genrep; int length = 32; + int eventlength = 0; /* length after first 32 bytes for GenericEvents */ void *buf; pending_reply *pend = 0; struct event_list *event; @@ -91,8 +88,8 @@ static int read_packet(xcb_connection_t *c) /* Compute 32-bit sequence number of this packet. */ if((genrep.response_type & 0x7f) != XCB_KEYMAP_NOTIFY) { - unsigned int lastread = c->in.request_read; - c->in.request_read = (lastread & 0xffff0000) | genrep.sequence; + 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(XCB_SEQUENCE_COMPARE(c->in.request_read, >, c->in.request_expected)) @@ -110,7 +107,8 @@ static int read_packet(xcb_connection_t *c) } while(c->in.pending_replies && - XCB_SEQUENCE_COMPARE (c->in.pending_replies->request, <=, c->in.request_completed)) + 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; @@ -126,7 +124,10 @@ static int read_packet(xcb_connection_t *c) 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; } @@ -141,17 +142,34 @@ static int read_packet(xcb_connection_t *c) length += genrep.length * 4; } - buf = malloc(length + (genrep.response_type == XCB_REPLY ? 0 : sizeof(uint32_t))); + /* XGE events may have sizes > 32 */ + if (genrep.response_type == XCB_XGE_EVENT) + eventlength = genrep.length * 4; + + buf = malloc(length + eventlength + + (genrep.response_type == XCB_REPLY ? 0 : sizeof(uint32_t))); if(!buf) { _xcb_conn_shutdown(c); 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(pend && (pend->flags & XCB_REQUEST_DISCARD_REPLY)) { free(buf); @@ -170,6 +188,7 @@ static int read_packet(xcb_connection_t *c) if(!cur) { _xcb_conn_shutdown(c); + free(buf); return 0; } cur->reply = buf; @@ -178,10 +197,10 @@ static int read_packet(xcb_connection_t *c) c->in.current_reply_tail = &cur->next; for(reader = c->in.readers; reader && - XCB_SEQUENCE_COMPARE(reader->request, <=, c->in.request_read); + XCB_SEQUENCE_COMPARE_32(reader->request, <=, c->in.request_read); reader = reader->next) { - if(reader->request == c->in.request_read) + if(XCB_SEQUENCE_COMPARE_32(reader->request, ==, c->in.request_read)) { pthread_cond_signal(reader->data); break; @@ -231,7 +250,7 @@ static void free_reply_list(struct reply_list *head) } } -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) @@ -241,12 +260,22 @@ static int read_block(const int fd, void *buf, const size_t len) done += ret; if(ret < 0 && errno == EAGAIN) { +#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); do { ret = select(fd + 1, &fds, 0, 0, 0); } while (ret == -1 && errno == EINTR); +#endif } if(ret <= 0) return ret; @@ -263,7 +292,7 @@ static int poll_for_reply(xcb_connection_t *c, unsigned int request, void **repl head = 0; /* 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)) + else if(XCB_SEQUENCE_COMPARE_32(request, <, c->in.request_read)) { head = _xcb_map_remove(c->in.replies, request); if(head && head->next) @@ -271,7 +300,7 @@ static int poll_for_reply(xcb_connection_t *c, unsigned int request, void **repl } /* 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) + else if(XCB_SEQUENCE_COMPARE_32(request, ==, c->in.request_read) && c->in.current_reply) { head = c->in.current_reply; c->in.current_reply = head->next; @@ -280,7 +309,7 @@ static int poll_for_reply(xcb_connection_t *c, unsigned int request, void **repl } /* 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) + else if(XCB_SEQUENCE_COMPARE_32(request, ==, c->in.request_completed)) head = 0; /* We may have more replies on the way for this request: block until we're * sure. */ @@ -313,16 +342,21 @@ static int poll_for_reply(xcb_connection_t *c, unsigned int request, void **repl void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e) { + uint64_t widened_request; void *ret = 0; if(e) *e = 0; if(c->has_error) return 0; - _xcb_lock_io(c); + pthread_mutex_lock(&c->iolock); + + widened_request = (c->out.request & UINT64_C(0xffffffff00000000)) | request; + if(widened_request > c->out.request) + widened_request -= UINT64_C(1) << 32; /* If this request has not been written yet, write it. */ - if(_xcb_out_flush_to(c, request)) + if(c->out.return_socket || _xcb_out_flush_to(c, widened_request)) { pthread_cond_t cond = PTHREAD_COND_INITIALIZER; reader_list reader; @@ -330,7 +364,7 @@ void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_ for(prev_reader = &c->in.readers; *prev_reader && - XCB_SEQUENCE_COMPARE ((*prev_reader)->request, <=, request); + XCB_SEQUENCE_COMPARE_32((*prev_reader)->request, <=, request); prev_reader = &(*prev_reader)->next) { /* empty */; @@ -346,7 +380,7 @@ void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_ for(prev_reader = &c->in.readers; *prev_reader && - XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, request); + XCB_SEQUENCE_COMPARE_32((*prev_reader)->request, <=, request); prev_reader = &(*prev_reader)->next) { if(*prev_reader == &reader) @@ -358,11 +392,121 @@ void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_ pthread_cond_destroy(&cond); } - wake_up_next_reader(c); - _xcb_unlock_io(c); + _xcb_in_wake_up_next_reader(c); + pthread_mutex_unlock(&c->iolock); return ret; } +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) + { + _xcb_conn_shutdown(c); + return; + } + + 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, unsigned int request) +{ + pending_reply *pend = 0; + pending_reply **prev_pend; + uint64_t widened_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. */ + if(XCB_SEQUENCE_COMPARE_32(request, <, c->in.request_read)) + { + struct reply_list *head; + head = _xcb_map_remove(c->in.replies, request); + while (head) + { + struct reply_list *next = head->next; + free(head->reply); + free(head); + head = next; + } + return; + } + + /* We're currently processing the responses to the request we want, and we + * have a reply ready to return. Free it, and mark the pend to free any further + * replies. */ + if(XCB_SEQUENCE_COMPARE_32(request, ==, c->in.request_read) && c->in.current_reply) + { + struct reply_list *head; + head = c->in.current_reply; + c->in.current_reply = NULL; + c->in.current_reply_tail = &c->in.current_reply; + while (head) + { + struct reply_list *next = head->next; + free(head->reply); + free(head); + head = next; + } + + pend = c->in.pending_replies; + 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; + if(pend) + pend->flags |= XCB_REQUEST_DISCARD_REPLY; + else + insert_pending_discard(c, &c->in.pending_replies, c->in.request_read); + + 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) + { + if(XCB_SEQUENCE_COMPARE_32((*prev_pend)->first_request, >, request)) + break; + + if(XCB_SEQUENCE_COMPARE_32((*prev_pend)->first_request, ==, request)) + { + /* Pending reply found. Mark for discard: */ + (*prev_pend)->flags |= XCB_REQUEST_DISCARD_REPLY; + return; + } + } + + /* Pending reply not found (likely due to _unchecked request). Create one: */ + widened_request = (c->out.request & UINT64_C(0xffffffff00000000)) | request; + if(widened_request > c->out.request) + widened_request -= UINT64_C(1) << 32; + + insert_pending_discard(c, prev_pend, widened_request); +} + +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, sequence); + pthread_mutex_unlock(&c->iolock); +} + int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error) { int ret; @@ -374,9 +518,9 @@ int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, return 1; /* would not block */ } assert(reply != 0); - _xcb_lock_io(c); + pthread_mutex_lock(&c->iolock); ret = poll_for_reply(c, request, reply, error); - _xcb_unlock_io(c); + pthread_mutex_unlock(&c->iolock); return ret; } @@ -385,14 +529,14 @@ xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c) xcb_generic_event_t *ret; if(c->has_error) return 0; - _xcb_lock_io(c); + 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_unlock_io(c); + _xcb_in_wake_up_next_reader(c); + pthread_mutex_unlock(&c->iolock); return ret; } @@ -401,12 +545,12 @@ xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c) xcb_generic_event_t *ret = 0; if(!c->has_error) { - _xcb_lock_io(c); + pthread_mutex_lock(&c->iolock); /* FIXME: follow X meets Z architecture changes. */ ret = get_event(c); if(!ret && _xcb_in_read(c)) /* _xcb_in_read shuts down the connection on error */ ret = get_event(c); - _xcb_unlock_io(c); + pthread_mutex_unlock(&c->iolock); } return ret; } @@ -420,8 +564,8 @@ xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t co void *reply; if(c->has_error) return 0; - if(XCB_SEQUENCE_COMPARE(cookie.sequence,>,c->in.request_expected) - && XCB_SEQUENCE_COMPARE(cookie.sequence,>,c->in.request_completed)) + if(XCB_SEQUENCE_COMPARE_32(cookie.sequence,>,c->in.request_expected) + && XCB_SEQUENCE_COMPARE_32(cookie.sequence,>,c->in.request_completed)) { free(xcb_get_input_focus_reply(c, xcb_get_input_focus(c), &ret)); assert(!ret); @@ -475,7 +619,17 @@ void _xcb_in_destroy(_xcb_in *in) } } -int _xcb_in_expect_reply(xcb_connection_t *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) { pending_reply *pend = malloc(sizeof(pending_reply)); assert(workaround != WORKAROUND_NONE || flags != 0); @@ -484,7 +638,7 @@ int _xcb_in_expect_reply(xcb_connection_t *c, unsigned int request, enum workaro _xcb_conn_shutdown(c); return 0; } - pend->request = request; + pend->first_request = pend->last_request = request; pend->workaround = workaround; pend->flags = flags; pend->next = 0; @@ -493,6 +647,20 @@ int _xcb_in_expect_reply(xcb_connection_t *c, unsigned int request, enum workaro return 1; } +void _xcb_in_replies_done(xcb_connection_t *c) +{ + 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 = read(c->fd, c->in.queue + c->in.queue_len, sizeof(c->in.queue) - c->in.queue_len);