aboutsummaryrefslogtreecommitdiff
path: root/libxcb/src/xcb_out.c
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /libxcb/src/xcb_out.c
downloadvcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.gz
vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.bz2
vcxsrv-3562e78743202e43aec8727005182a2558117eca.zip
Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'libxcb/src/xcb_out.c')
-rw-r--r--libxcb/src/xcb_out.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/libxcb/src/xcb_out.c b/libxcb/src/xcb_out.c
new file mode 100644
index 000000000..60226e581
--- /dev/null
+++ b/libxcb/src/xcb_out.c
@@ -0,0 +1,303 @@
+/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the names of the authors or their
+ * institutions shall not be used in advertising or otherwise to promote the
+ * sale, use or other dealings in this Software without prior written
+ * authorization from the authors.
+ */
+
+/* Stuff that sends stuff to the server. */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "xcb.h"
+#include "xcbext.h"
+#include "xcbint.h"
+#include "bigreq.h"
+
+static int write_block(xcb_connection_t *c, struct iovec *vector, int count)
+{
+ while(count && c->out.queue_len + vector[0].iov_len <= sizeof(c->out.queue))
+ {
+ memcpy(c->out.queue + c->out.queue_len, vector[0].iov_base, vector[0].iov_len);
+ c->out.queue_len += vector[0].iov_len;
+ vector[0].iov_base = (char *) vector[0].iov_base + vector[0].iov_len;
+ vector[0].iov_len = 0;
+ ++vector, --count;
+ }
+ if(!count)
+ return 1;
+
+ --vector, ++count;
+ vector[0].iov_base = c->out.queue;
+ vector[0].iov_len = c->out.queue_len;
+ c->out.queue_len = 0;
+ return _xcb_out_send(c, &vector, &count);
+}
+
+/* Public interface */
+
+void xcb_prefetch_maximum_request_length(xcb_connection_t *c)
+{
+ if(c->has_error)
+ return;
+ pthread_mutex_lock(&c->out.reqlenlock);
+ if(c->out.maximum_request_length_tag == LAZY_NONE)
+ {
+ const xcb_query_extension_reply_t *ext;
+ ext = xcb_get_extension_data(c, &xcb_big_requests_id);
+ if(ext && ext->present)
+ {
+ c->out.maximum_request_length_tag = LAZY_COOKIE;
+ c->out.maximum_request_length.cookie = xcb_big_requests_enable(c);
+ }
+ else
+ {
+ c->out.maximum_request_length_tag = LAZY_FORCED;
+ c->out.maximum_request_length.value = c->setup->maximum_request_length;
+ }
+ }
+ pthread_mutex_unlock(&c->out.reqlenlock);
+}
+
+uint32_t xcb_get_maximum_request_length(xcb_connection_t *c)
+{
+ if(c->has_error)
+ return 0;
+ xcb_prefetch_maximum_request_length(c);
+ pthread_mutex_lock(&c->out.reqlenlock);
+ if(c->out.maximum_request_length_tag == LAZY_COOKIE)
+ {
+ xcb_big_requests_enable_reply_t *r = xcb_big_requests_enable_reply(c, c->out.maximum_request_length.cookie, 0);
+ c->out.maximum_request_length_tag = LAZY_FORCED;
+ if(r)
+ {
+ c->out.maximum_request_length.value = r->maximum_request_length;
+ free(r);
+ }
+ else
+ c->out.maximum_request_length.value = c->setup->maximum_request_length;
+ }
+ pthread_mutex_unlock(&c->out.reqlenlock);
+ return c->out.maximum_request_length.value;
+}
+
+unsigned int xcb_send_request(xcb_connection_t *c, int flags, struct iovec *vector, const xcb_protocol_request_t *req)
+{
+ static const union {
+ struct {
+ uint8_t major;
+ uint8_t pad;
+ uint16_t len;
+ } fields;
+ uint32_t packet;
+ } sync = { { /* GetInputFocus */ 43, 0, 1 } };
+ unsigned int request;
+ uint32_t prefix[3] = { 0 };
+ int veclen = req->count;
+ enum workarounds workaround = WORKAROUND_NONE;
+
+ if(c->has_error)
+ return 0;
+
+ assert(c != 0);
+ assert(vector != 0);
+ assert(req->count > 0);
+
+ if(!(flags & XCB_REQUEST_RAW))
+ {
+ static const char pad[3];
+ int i;
+ uint16_t shortlen = 0;
+ size_t longlen = 0;
+ assert(vector[0].iov_len >= 4);
+ /* set the major opcode, and the minor opcode for extensions */
+ if(req->ext)
+ {
+ const xcb_query_extension_reply_t *extension = xcb_get_extension_data(c, req->ext);
+ if(!(extension && extension->present))
+ {
+ _xcb_conn_shutdown(c);
+ return 0;
+ }
+ ((uint8_t *) vector[0].iov_base)[0] = extension->major_opcode;
+ ((uint8_t *) vector[0].iov_base)[1] = req->opcode;
+ }
+ else
+ ((uint8_t *) vector[0].iov_base)[0] = req->opcode;
+
+ /* put together the length field, possibly using BIGREQUESTS */
+ for(i = 0; i < req->count; ++i)
+ {
+ longlen += vector[i].iov_len;
+ if(!vector[i].iov_base)
+ {
+ vector[i].iov_base = (char *) pad;
+ assert(vector[i].iov_len <= sizeof(pad));
+ }
+ }
+ assert((longlen & 3) == 0);
+ longlen >>= 2;
+
+ if(longlen <= c->setup->maximum_request_length)
+ {
+ /* we don't need BIGREQUESTS. */
+ shortlen = longlen;
+ longlen = 0;
+ }
+ else if(longlen > xcb_get_maximum_request_length(c))
+ {
+ _xcb_conn_shutdown(c);
+ return 0; /* server can't take this; maybe need BIGREQUESTS? */
+ }
+
+ /* set the length field. */
+ ((uint16_t *) vector[0].iov_base)[1] = shortlen;
+ if(!shortlen)
+ prefix[2] = ++longlen;
+ }
+ flags &= ~XCB_REQUEST_RAW;
+
+ /* do we need to work around the X server bug described in glx.xml? */
+ /* XXX: GetFBConfigs won't use BIG-REQUESTS in any sane
+ * configuration, but that should be handled here anyway. */
+ if(req->ext && !req->isvoid && !strcmp(req->ext->name, "GLX") &&
+ ((req->opcode == 17 && ((uint32_t *) vector[0].iov_base)[1] == 0x10004) ||
+ req->opcode == 21))
+ workaround = WORKAROUND_GLX_GET_FB_CONFIGS_BUG;
+
+ /* get a sequence number and arrange for delivery. */
+ _xcb_lock_io(c);
+ /* wait for other writing threads to get out of my way. */
+ while(c->out.writing)
+ _xcb_wait_io(c, &c->out.cond);
+
+ request = ++c->out.request;
+ /* send GetInputFocus (sync) when 64k-2 requests have been sent without
+ * a reply.
+ * Also send sync (could use NoOp) at 32-bit wrap to avoid having
+ * applications see sequence 0 as that is used to indicate
+ * an error in sending the request */
+ while((req->isvoid &&
+ c->out.request == c->in.request_expected + (1 << 16) - 1) ||
+ request == 0)
+ {
+ prefix[0] = sync.packet;
+ _xcb_in_expect_reply(c, request, WORKAROUND_NONE, XCB_REQUEST_DISCARD_REPLY);
+ c->in.request_expected = c->out.request;
+ request = ++c->out.request;
+ }
+
+ if(workaround != WORKAROUND_NONE || flags != 0)
+ _xcb_in_expect_reply(c, request, workaround, flags);
+ if(!req->isvoid)
+ c->in.request_expected = c->out.request;
+
+ if(prefix[0] || prefix[2])
+ {
+ --vector, ++veclen;
+ if(prefix[2])
+ {
+ prefix[1] = ((uint32_t *) vector[1].iov_base)[0];
+ vector[1].iov_base = (uint32_t *) vector[1].iov_base + 1;
+ vector[1].iov_len -= sizeof(uint32_t);
+ }
+ vector[0].iov_len = sizeof(uint32_t) * (prefix[0] ? 1 : 0 | prefix[2] ? 2 : 0);
+ vector[0].iov_base = prefix + !prefix[0];
+ }
+
+ if(!write_block(c, vector, veclen))
+ {
+ _xcb_conn_shutdown(c);
+ request = 0;
+ }
+ _xcb_unlock_io(c);
+ return request;
+}
+
+int xcb_flush(xcb_connection_t *c)
+{
+ int ret;
+ if(c->has_error)
+ return 0;
+ _xcb_lock_io(c);
+ ret = _xcb_out_flush_to(c, c->out.request);
+ _xcb_unlock_io(c);
+ return ret;
+}
+
+/* Private interface */
+
+int _xcb_out_init(_xcb_out *out)
+{
+ if(pthread_cond_init(&out->cond, 0))
+ return 0;
+ out->writing = 0;
+
+ out->queue_len = 0;
+
+ out->request = 0;
+ out->request_written = 0;
+
+ if(pthread_mutex_init(&out->reqlenlock, 0))
+ return 0;
+ out->maximum_request_length_tag = LAZY_NONE;
+
+ return 1;
+}
+
+void _xcb_out_destroy(_xcb_out *out)
+{
+ pthread_cond_destroy(&out->cond);
+ pthread_mutex_destroy(&out->reqlenlock);
+}
+
+int _xcb_out_send(xcb_connection_t *c, struct iovec **vector, int *count)
+{
+ int ret = 1;
+ while(ret && *count)
+ ret = _xcb_conn_wait(c, &c->out.cond, vector, count);
+ c->out.request_written = c->out.request;
+ pthread_cond_broadcast(&c->out.cond);
+ return ret;
+}
+
+int _xcb_out_flush_to(xcb_connection_t *c, unsigned int request)
+{
+ assert(XCB_SEQUENCE_COMPARE(request, <=, c->out.request));
+ if(XCB_SEQUENCE_COMPARE(c->out.request_written, >=, request))
+ return 1;
+ if(c->out.queue_len)
+ {
+ struct iovec vec, *vec_ptr = &vec;
+ int count = 1;
+ vec.iov_base = c->out.queue;
+ vec.iov_len = c->out.queue_len;
+ c->out.queue_len = 0;
+ return _xcb_out_send(c, &vec_ptr, &count);
+ }
+ while(c->out.writing)
+ _xcb_wait_io(c, &c->out.cond);
+ assert(XCB_SEQUENCE_COMPARE(c->out.request_written, >=, request));
+ return 1;
+}