aboutsummaryrefslogtreecommitdiffstats
path: root/src/vlibmemory/unix_shared_memory_queue.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/vlibmemory/unix_shared_memory_queue.h')
-rw-r--r--src/vlibmemory/unix_shared_memory_queue.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/vlibmemory/unix_shared_memory_queue.h b/src/vlibmemory/unix_shared_memory_queue.h
new file mode 100644
index 00000000..27de3218
--- /dev/null
+++ b/src/vlibmemory/unix_shared_memory_queue.h
@@ -0,0 +1,70 @@
+/*
+ *------------------------------------------------------------------
+ * unix_shared_memory_queue.h - shared-memory queues
+ *
+ * Copyright (c) 2009 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#ifndef included_unix_shared_memory_queue_h
+#define included_unix_shared_memory_queue_h
+
+#include <pthread.h>
+
+typedef struct _unix_shared_memory_queue
+{
+ pthread_mutex_t mutex; /* 8 bytes */
+ pthread_cond_t condvar; /* 8 bytes */
+ int head;
+ int tail;
+ volatile int cursize;
+ int maxsize;
+ int elsize;
+ int consumer_pid;
+ int signal_when_queue_non_empty;
+ char data[0];
+} unix_shared_memory_queue_t;
+
+unix_shared_memory_queue_t *unix_shared_memory_queue_init (int nels,
+ int elsize,
+ int consumer_pid,
+ int
+ signal_when_queue_non_empty);
+void unix_shared_memory_queue_free (unix_shared_memory_queue_t * q);
+int unix_shared_memory_queue_add (unix_shared_memory_queue_t * q, u8 * elem,
+ int nowait);
+int unix_shared_memory_queue_add2 (unix_shared_memory_queue_t * q, u8 * elem,
+ u8 * elem2, int nowait);
+int unix_shared_memory_queue_sub (unix_shared_memory_queue_t * q, u8 * elem,
+ int nowait);
+void unix_shared_memory_queue_lock (unix_shared_memory_queue_t * q);
+void unix_shared_memory_queue_unlock (unix_shared_memory_queue_t * q);
+int unix_shared_memory_queue_is_full (unix_shared_memory_queue_t * q);
+int unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t * q,
+ u8 * elem);
+
+int unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t * q,
+ u8 * elem);
+int unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t * q,
+ u8 * elem);
+
+#endif /* included_unix_shared_memory_queue_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */