Cygwin: Pass file paths instead of file descriptors over UNIX sockets

[lttng-ust.git] / libringbuffer / shm.h

diff --git a/libringbuffer/shm.h b/libringbuffer/shm.h
index 45b6473d6fb0e9cee2a8e4c551e4d421912b020c..a745d34592bab4b962990b6a90255b3e74e60222 100644 (file)
--- a/libringbuffer/shm.h
+++ b/libringbuffer/shm.h
@@ -4,14 +4,26 @@
 /*
  * libringbuffer/shm.h
  *
- * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * This library 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; only
+ * version 2.1 of the License.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <stdint.h>
-#include <ust/usterr-signal-safe.h>
-#include "ust/core.h"
+#include <usterr-signal-safe.h>
+#include <urcu/compiler.h>
 #include "shm_types.h"
 
 /*
@@ -31,13 +43,13 @@ char *_shmp_offset(struct shm_object_table *table, struct shm_ref *ref,
        size_t objindex, ref_offset;
 
        objindex = (size_t) ref->index;
-       if (unlikely(objindex >= table->allocated_len))
+       if (caa_unlikely(objindex >= table->allocated_len))
                return NULL;
        obj = &table->objects[objindex];
        ref_offset = (size_t) ref->offset;
        ref_offset += idx * elem_size;
        /* Check if part of the element returned would exceed the limits. */
-       if (unlikely(ref_offset + elem_size > obj->memory_map_size))
+       if (caa_unlikely(ref_offset + elem_size > obj->memory_map_size))
                return NULL;
        return &obj->memory_map[ref_offset];
 }
@@ -77,14 +89,14 @@ struct shm_ref zalloc_shm(struct shm_object *obj, size_t len);
 void align_shm(struct shm_object *obj, size_t align);
 
 static inline
-int shm_get_wakeup_fd(struct shm_handle *handle, struct shm_ref *ref)
+int shm_get_wakeup_fd(struct lttng_ust_shm_handle *handle, struct shm_ref *ref)
 {
        struct shm_object_table *table = handle->table;
        struct shm_object *obj;
        size_t index;
 
        index = (size_t) ref->index;
-       if (unlikely(index >= table->allocated_len))
+       if (caa_unlikely(index >= table->allocated_len))
                return -EPERM;
        obj = &table->objects[index];
        return obj->wait_fd[1];
@@ -92,34 +104,38 @@ int shm_get_wakeup_fd(struct shm_handle *handle, struct shm_ref *ref)
 }
 
 static inline
-int shm_get_wait_fd(struct shm_handle *handle, struct shm_ref *ref)
+int shm_get_wait_fd(struct lttng_ust_shm_handle *handle, struct shm_ref *ref)
 {
        struct shm_object_table *table = handle->table;
        struct shm_object *obj;
        size_t index;
 
        index = (size_t) ref->index;
-       if (unlikely(index >= table->allocated_len))
+       if (caa_unlikely(index >= table->allocated_len))
                return -EPERM;
        obj = &table->objects[index];
        return obj->wait_fd[0];
 }
 
 static inline
-int shm_get_object_data(struct shm_handle *handle, struct shm_ref *ref,
-               int *shm_fd, int *wait_fd, uint64_t *memory_map_size)
+int shm_get_object_data(struct lttng_ust_shm_handle *handle, struct shm_ref *ref,
+                       int **shm_fd, char **shm_path,
+                       int **wait_fd, char **wait_pipe_path,
+                       uint64_t **memory_map_size)
 {
        struct shm_object_table *table = handle->table;
        struct shm_object *obj;
        size_t index;
 
        index = (size_t) ref->index;
-       if (unlikely(index >= table->allocated_len))
+       if (caa_unlikely(index >= table->allocated_len))
                return -EPERM;
        obj = &table->objects[index];
-       *shm_fd = obj->shm_fd;
-       *wait_fd = obj->wait_fd[0];
-       *memory_map_size = obj->allocated_len;
+       *shm_fd   = &obj->shm_fd;
+       *shm_path = obj->shm_path;
+       *wait_fd        = &obj->wait_fd[0];
+       *wait_pipe_path = obj->wait_pipe_path;
+       *memory_map_size = &obj->allocated_len;
        return 0;
 }