add new auth cookie singleton

src/pulsecore/auth-cookie.c

@@ -0,0 +1,109 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2008 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; 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 <sys/types.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/util.h>
+
+#include <pulsecore/refcnt.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/shared.h>
+#include <pulsecore/authkey.h>
+
+#include "auth-cookie.h"
+
+struct pa_auth_cookie {
+    PA_REFCNT_DECLARE;
+    pa_core *core;
+    char *name;
+    size_t size;
+};
+
+pa_auth_cookie* pa_auth_cookie_get(pa_core *core, const char *cn, size_t size) {
+    pa_auth_cookie *c;
+    char *t;
+
+    pa_assert(core);
+    pa_assert(size > 0);
+
+    t = pa_sprintf_malloc("auth-cookie%s%s", cn ? "@" : "", cn ? cn : "");
+
+    if ((c = pa_shared_get(core, t))) {
+
+        pa_xfree(t);
+
+        if (c->size != size)
+            return NULL;
+
+        return pa_auth_cookie_ref(c);
+    }
+
+    c = pa_xmalloc(PA_ALIGN(sizeof(pa_auth_cookie)) + size);
+    PA_REFCNT_INIT(c);
+    c->core = core;
+    c->name = t;
+    c->size = size;
+
+    pa_assert_se(pa_shared_set(core, t, c) >= 0);
+
+    if (pa_authkey_load_auto(cn, (uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie)), size) < 0) {
+        pa_auth_cookie_unref(c);
+        return NULL;
+    }
+
+    return c;
+}
+
+pa_auth_cookie* pa_auth_cookie_ref(pa_auth_cookie *c) {
+    pa_assert(c);
+    pa_assert(PA_REFCNT_VALUE(c) >= 1);
+
+    PA_REFCNT_INC(c);
+
+    return c;
+}
+
+void pa_auth_cookie_unref(pa_auth_cookie *c) {
+    pa_assert(c);
+    pa_assert(PA_REFCNT_VALUE(c) >= 1);
+
+    if (PA_REFCNT_DEC(c) > 0)
+        return;
+
+    pa_assert_se(pa_shared_remove(c->core, c->name) >= 0);
+
+    pa_xfree(c->name);
+    pa_xfree(c);
+}
+
+const uint8_t* pa_auth_cookie_read(pa_auth_cookie *c, size_t size) {
+    pa_assert(c);
+    pa_assert(PA_REFCNT_VALUE(c) >= 1);
+    pa_assert(c->size == size);
+
+    return (const uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie));
+}

src/pulsecore/auth-cookie.h

@@ -0,0 +1,35 @@
+#ifndef fooauthcookiehfoo
+#define fooauthcookiehfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2008 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <pulsecore/core.h>
+
+typedef struct pa_auth_cookie pa_auth_cookie;
+
+pa_auth_cookie* pa_auth_cookie_get(pa_core *c, const char *cn, size_t size);
+pa_auth_cookie* pa_auth_cookie_ref(pa_auth_cookie *c);
+void pa_auth_cookie_unref(pa_auth_cookie *c);
+
+const uint8_t* pa_auth_cookie_read(pa_auth_cookie *, size_t size);
+
+#endif