- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
- * * 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
+ * * 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
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
- * OWNER 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
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ * OWNER 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
-struct rte_dummy {
- TAILQ_ENTRY(rte_dummy) next; /**< Pointer entries for a tailq list */
+struct rte_tailq_entry {
+ TAILQ_ENTRY(rte_tailq_entry) next; /**< Pointer entries for a tailq list */
+ void *data; /**< Pointer to the data referenced by this tailq entry */
-#else
-struct rte_tailq_head {};
-#endif
+
+/**
+ * Return the first tailq entry casted to the right struct.
+ */
+#define RTE_TAILQ_CAST(tailq_entry, struct_name) \
+ (struct struct_name *)&(tailq_entry)->tailq_head
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_RESERVE(name, struct_name) \
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_RESERVE(name, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_reserve(name)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_reserve(name), struct_name)
+
+/**
+ * Utility macro to make reserving a tailqueue for a particular struct easier.
+ *
+ * @param idx
+ * The tailq idx defined in rte_tail_t to be given to the tail queue.
+ * - used by lookup to find it later
+ *
+ * @param struct_name
+ * The name of the list type we are using. (Generally this is the same as the
+ * first parameter passed to TAILQ_HEAD macro)
+ *
+ * @return
+ * The return value from rte_eal_tailq_reserve, typecast to the appropriate
+ * structure pointer type.
+ * NULL on error, since the tailq_head is the first
+ * element in the rte_tailq_head structure.
+ */
+#define RTE_TAILQ_RESERVE_BY_IDX(idx, struct_name) \
+ RTE_TAILQ_CAST(rte_eal_tailq_reserve_by_idx(idx), struct_name)
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_LOOKUP(name, struct_name) \
* element in the rte_tailq_head structure.
*/
#define RTE_TAILQ_LOOKUP(name, struct_name) \
- (struct struct_name *)(&rte_eal_tailq_lookup(name)->tailq_head)
+ RTE_TAILQ_CAST(rte_eal_tailq_lookup(name), struct_name)
+
+/**
+ * Utility macro to make looking up a tailqueue for a particular struct easier.
+ *
+ * @param idx
+ * The tailq idx defined in rte_tail_t to be given to the tail queue.
+ *
+ * @param struct_name
+ * The name of the list type we are using. (Generally this is the same as the
+ * first parameter passed to TAILQ_HEAD macro)
+ *
+ * @return
+ * The return value from rte_eal_tailq_lookup, typecast to the appropriate
+ * structure pointer type.
+ * NULL on error, since the tailq_head is the first
+ * element in the rte_tailq_head structure.
+ */
+#define RTE_TAILQ_LOOKUP_BY_IDX(idx, struct_name) \
+ RTE_TAILQ_CAST(rte_eal_tailq_lookup_by_idx(idx), struct_name)
+/**
+ * Reserve a slot in the tailq list for a particular tailq header
+ * Note: this function, along with rte_tailq_lookup, is not multi-thread safe,
+ * and both these functions should only be called from a single thread at a time
+ *
+ * @param idx
+ * The tailq idx defined in rte_tail_t to be given to the tail queue.
+ * @return
+ * A pointer to the newly reserved tailq entry
+ */
+struct rte_tailq_head *rte_eal_tailq_reserve_by_idx(const unsigned idx);
+
+/**
+ * Dump tail queues to the console.
+ *
+ * @param f
+ * A pointer to a file for output
+ */
+void rte_dump_tailq(FILE *f);
+
+/**
+ * Lookup for a tail queue.
+ *
+ * Get a pointer to a tail queue header of an already reserved tail
+ * queue identified by the name given as an argument.
+ * Note: this function, along with rte_tailq_reserve, is not multi-thread safe,
+ * and both these functions should only be called from a single thread at a time
+ *
+ * @param idx
+ * The tailq idx defined in rte_tail_t to be given to the tail queue.
+ * @return
+ * A pointer to the tail queue head structure.
+ */
+struct rte_tailq_head *rte_eal_tailq_lookup_by_idx(const unsigned idx);
+