some updates for pa_hashmap

add property infrastructure
add module module-x11-publish
allow ldpreloading of all modules
abstract x11wrap from module-x11-bell


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@268 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 167 insertions, 0 deletions

diff --git a/polyp/module-x11-publish.c b/polyp/module-x11-publish.c
new file mode 100644
index 00000000..fd4df4ad
--- /dev/null
+++ b/polyp/module-x11-publish.c
@@ -0,0 +1,167 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU General Public License
+  along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+#include "module.h"
+#include "sink.h"
+#include "scache.h"
+#include "modargs.h"
+#include "xmalloc.h"
+#include "namereg.h"
+#include "log.h"
+#include "x11wrap.h"
+#include "util.h"
+
+#include "module-x11-publish-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering")
+PA_MODULE_DESCRIPTION("X11 Credential Publisher")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE("display=<X11 display>")
+
+static const char* const valid_modargs[] = {
+    "display",
+    "sink",
+    "source",
+    NULL
+};
+
+struct userdata {
+    struct pa_core *core;
+    struct pa_x11_wrapper *x11_wrapper;
+    Display *display;
+    char *id;
+};
+
+static void set_x11_prop(Display *d, const char *name, const char *data) {
+    Atom a = XInternAtom(d, name, False);
+    XChangeProperty(d, RootWindow(d, 0), a, XA_STRING, 8, PropModeReplace, (unsigned char*) data, strlen(data)+1);
+}
+
+static void del_x11_prop(Display *d, const char *name) {
+    Atom a = XInternAtom(d, name, False);
+    XDeleteProperty(d, RootWindow(d, 0), a);
+}
+
+static char* get_x11_prop(Display *d, const char *name, char *p, size_t l) {
+    Atom actual_type;
+    int actual_format;
+    unsigned long nitems;
+    unsigned long nbytes_after;
+    unsigned char *prop;
+    
+    Atom a = XInternAtom(d, name, False);
+    if (XGetWindowProperty(d, RootWindow(d, 0), a, 0, (l+2)/4, False, XA_STRING, &actual_type, &actual_format, &nitems, &nbytes_after, &prop) != Success)
+        return NULL;
+
+    memcpy(p, prop, nitems);
+    p[nitems] = 0;
+
+    XFree(prop);
+    return p;
+}
+
+int pa__init(struct pa_core *c, struct pa_module*m) {
+    struct userdata *u;
+    struct pa_modargs *ma = NULL;
+    char hn[256], un[128];
+     const char *t;
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log(__FILE__": failed to parse module arguments\n");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xmalloc(sizeof(struct userdata));
+    u->core = c;
+    u->id = NULL;
+
+    if (!(u->x11_wrapper = pa_x11_wrapper_get(c, pa_modargs_get_value(ma, "display", NULL)))) 
+        goto fail;
+
+    u->display = pa_x11_wrapper_get_display(u->x11_wrapper);
+
+    pa_get_host_name(hn, sizeof(hn));
+    pa_get_user_name(un, sizeof(un));
+    
+    u->id = pa_sprintf_malloc("%s@%s/%u", un, hn, (unsigned) getpid());
+
+    set_x11_prop(u->display, "POLYP_SERVER", hn);
+    set_x11_prop(u->display, "POLYP_ID", u->id);
+
+    if ((t = pa_modargs_get_value(ma, "source", NULL)))
+        set_x11_prop(u->display, "POLYP_SOURCE", t);
+
+    if ((t = pa_modargs_get_value(ma, "sink", NULL)))
+        set_x11_prop(u->display, "POLYP_SINK", t);
+    
+    pa_modargs_free(ma);
+    return 0;
+    
+fail:
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa__done(c, m);
+    return -1;
+}
+
+void pa__done(struct pa_core *c, struct pa_module*m) {
+    struct userdata*u;
+    assert(c && m);
+
+    if (!(u = m->userdata))
+        return;
+    
+    if (u->x11_wrapper) {
+        char t[256];
+
+        /* Yes, here is a race condition */
+        if (!get_x11_prop(u->display, "POLYP_ID", t, sizeof(t)) || strcmp(t, u->id))
+            pa_log("WARNING: Polypaudio information vanished from X11!\n");
+        else {
+            del_x11_prop(u->display, "POLYP_ID");
+            del_x11_prop(u->display, "POLYP_SERVER");
+            del_x11_prop(u->display, "POLYP_SINK");
+            del_x11_prop(u->display, "POLYP_SOURCE");
+            XSync(u->display, False);
+        }
+    }
+    
+    if (u->x11_wrapper)
+        pa_x11_wrapper_unref(u->x11_wrapper);
+
+    pa_xfree(u->id);
+    pa_xfree(u);
+}
+