--- /dev/null
+/*
+ * Copyright (c) 2009 Kungliga Tekniska Högskolan
+ * (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 HAVE_GCD
+#include <dispatch/dispatch.h>
+#else
+#include "heim_threads.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 ? cred->uid : (uid_t)-1;
+}
+
+gid_t
+heim_ipc_cred_get_gid(heim_icred cred)
+{
+ return cred ? cred->gid : (gid_t)-1;
+}
+
+pid_t
+heim_ipc_cred_get_pid(heim_icred cred)
+{
+ return cred ? cred->pid : (pid_t)0;
+}
+
+pid_t
+heim_ipc_cred_get_session(heim_icred cred)
+{
+ return cred ? cred->session : (pid_t)-1;
+}
+
+
+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;
+}
+
+#ifndef HAVE_GCD
+struct heim_isemaphore {
+ HEIMDAL_MUTEX mutex;
+#ifdef ENABLE_PTHREAD_SUPPORT
+ pthread_cond_t cond;
+#endif
+ long counter;
+};
+#endif
+
+heim_isemaphore
+heim_ipc_semaphore_create(long value)
+{
+#ifdef HAVE_GCD
+ return (heim_isemaphore)dispatch_semaphore_create(value);
+#elif !defined(ENABLE_PTHREAD_SUPPORT)
+ heim_assert(0, "no semaphore support w/o pthreads");
+ return NULL;
+#else
+ heim_isemaphore s = malloc(sizeof(*s));
+ if (s == NULL)
+ return NULL;
+ HEIMDAL_MUTEX_init(&s->mutex);
+ pthread_cond_init(&s->cond, NULL);
+ s->counter = value;
+ return s;
+#endif
+}
+
+long
+heim_ipc_semaphore_wait(heim_isemaphore s, time_t t)
+{
+#ifdef HAVE_GCD
+ 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);
+#elif !defined(ENABLE_PTHREAD_SUPPORT)
+ heim_assert(0, "no semaphore support w/o pthreads");
+ return 0;
+#else
+ HEIMDAL_MUTEX_lock(&s->mutex);
+ /* if counter hits below zero, we get to wait */
+ if (--s->counter < 0) {
+ int ret;
+
+ if (t == HEIM_IPC_WAIT_FOREVER)
+ ret = pthread_cond_wait(&s->cond, &s->mutex);
+ else {
+ struct timespec ts;
+ ts.tv_sec = t;
+ ts.tv_nsec = 0;
+ ret = pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
+ }
+ if (ret) {
+ HEIMDAL_MUTEX_unlock(&s->mutex);
+ return errno;
+ }
+ }
+ HEIMDAL_MUTEX_unlock(&s->mutex);
+
+ return 0;
+#endif
+}
+
+long
+heim_ipc_semaphore_signal(heim_isemaphore s)
+{
+#ifdef HAVE_GCD
+ return dispatch_semaphore_signal((dispatch_semaphore_t)s);
+#elif !defined(ENABLE_PTHREAD_SUPPORT)
+ heim_assert(0, "no semaphore support w/o pthreads");
+ return EINVAL;
+#else
+ int wakeup;
+ HEIMDAL_MUTEX_lock(&s->mutex);
+ wakeup = (++s->counter == 0) ;
+ HEIMDAL_MUTEX_unlock(&s->mutex);
+ if (wakeup)
+ pthread_cond_signal(&s->cond);
+ return 0;
+#endif
+}
+
+void
+heim_ipc_semaphore_release(heim_isemaphore s)
+{
+#ifdef HAVE_GCD
+ dispatch_release((dispatch_semaphore_t)s);
+#elif !defined(ENABLE_PTHREAD_SUPPORT)
+ heim_assert(0, "no semaphore support w/o pthreads");
+#else
+ HEIMDAL_MUTEX_lock(&s->mutex);
+ if (s->counter != 0)
+ abort();
+ HEIMDAL_MUTEX_unlock(&s->mutex);
+ HEIMDAL_MUTEX_destroy(&s->mutex);
+ pthread_cond_destroy(&s->cond);
+ free(s);
+#endif
+}
+
+void
+heim_ipc_free_data(heim_idata *data)
+{
+ if (data->data)
+ free(data->data);
+ data->data = NULL;
+ data->length = 0;
+}
git.samba.org / samba.git / blobdiff