basic ipc framework

lib/ipc/common.c

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+/*
+ * Copyright (c) 2009 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "hi_locl.h"
+#ifdef __APPLE__
+#include <dispatch/dispatch.h>
+#endif
+
+struct heim_icred {
+    uid_t uid;
+    gid_t gid;
+    pid_t pid;
+    pid_t session;
+};
+
+void
+heim_ipc_free_cred(heim_icred cred)
+{
+    free(cred);
+}
+
+uid_t
+heim_ipc_cred_get_uid(heim_icred cred)
+{
+    return cred->uid;
+}
+
+gid_t
+heim_ipc_cred_get_gid(heim_icred cred)
+{
+    return cred->gid;
+}
+
+pid_t
+heim_ipc_cred_get_pid(heim_icred cred)
+{
+    return cred->pid;
+}
+
+pid_t
+heim_ipc_cred_get_session(heim_icred cred)
+{
+    return cred->session;
+}
+
+
+int
+_heim_ipc_create_cred(uid_t uid, gid_t gid, pid_t pid, pid_t session, heim_icred *cred)
+{
+    *cred = calloc(1, sizeof(**cred));
+    if (*cred == NULL)
+	return ENOMEM;
+    (*cred)->uid = uid;
+    (*cred)->gid = gid;
+    (*cred)->pid = pid;
+    (*cred)->session = session;
+    return 0;
+}
+
+void
+heim_ipc_main(void)
+{
+#if __APPLE__
+    dispatch_main();
+#else
+    abort();
+#endif
+}
+
+heim_isemaphore
+heim_ipc_semaphore_create(long value)
+{
+#ifdef __APPLE__
+    return (heim_isemaphore)dispatch_semaphore_create(value);
+#else
+    abort();
+#endif
+}
+
+long
+heim_ipc_semaphore_wait(heim_isemaphore s, time_t t)
+{
+#ifdef __APPLE__
+    uint64_t timeout;
+    if (t == HEIM_IPC_WAIT_FOREVER)
+	timeout = DISPATCH_TIME_FOREVER;
+    else
+	timeout = (uint64_t)t * NSEC_PER_SEC;
+
+    return dispatch_semaphore_wait((dispatch_semaphore_t)s, timeout);
+#else
+    abort();
+#endif
+}
+
+long
+heim_ipc_semaphore_signal(heim_isemaphore s)
+{
+#ifdef __APPLE__
+    return dispatch_semaphore_signal((dispatch_semaphore_t)s);
+#else
+    abort();
+#endif
+}
+
+void
+heim_ipc_semaphore_release(heim_isemaphore s)
+{
+#ifdef __APPLE__
+    return dispatch_release((dispatch_semaphore_t)s);
+#else
+    abort();
+#endif
+}
+
+void
+heim_ipc_free_data(heim_idata *data)
+{
+    if (data->data)
+	free(data->data);
+    data->data = NULL;
+    data->length = 0;
+}