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39 * Here defines rte_tailq APIs for only internal use
47 #include <sys/queue.h>
50 /** dummy structure type used by the rte_tailq APIs */
51 struct rte_tailq_entry {
52 TAILQ_ENTRY(rte_tailq_entry) next; /**< Pointer entries for a tailq list */
53 void *data; /**< Pointer to the data referenced by this tailq entry */
56 TAILQ_HEAD(rte_tailq_entry_head, rte_tailq_entry);
58 #define RTE_TAILQ_NAMESIZE 32
61 * The structure defining a tailq header entry for storing
62 * in the rte_config structure in shared memory. Each tailq
63 * is identified by name.
64 * Any library storing a set of objects e.g. rings, mempools, hash-tables,
65 * is recommended to use an entry here, so as to make it easy for
66 * a multi-process app to find already-created elements in shared memory.
68 struct rte_tailq_head {
69 struct rte_tailq_entry_head tailq_head; /**< NOTE: must be first element */
73 * Utility macro to make reserving a tailqueue for a particular struct easier.
76 * The name to be given to the tailq - used by lookup to find it later
79 * The name of the list type we are using. (Generally this is the same as the
80 * first parameter passed to TAILQ_HEAD macro)
83 * The return value from rte_eal_tailq_reserve, typecast to the appropriate
84 * structure pointer type.
85 * NULL on error, since the tailq_head is the first
86 * element in the rte_tailq_head structure.
88 #define RTE_TAILQ_RESERVE(name, struct_name) \
89 (struct struct_name *)(&rte_eal_tailq_reserve(name)->tailq_head)
92 * Utility macro to make reserving a tailqueue for a particular struct easier.
95 * The tailq idx defined in rte_tail_t to be given to the tail queue.
96 * - used by lookup to find it later
99 * The name of the list type we are using. (Generally this is the same as the
100 * first parameter passed to TAILQ_HEAD macro)
103 * The return value from rte_eal_tailq_reserve, typecast to the appropriate
104 * structure pointer type.
105 * NULL on error, since the tailq_head is the first
106 * element in the rte_tailq_head structure.
108 #define RTE_TAILQ_RESERVE_BY_IDX(idx, struct_name) \
109 (struct struct_name *)(&rte_eal_tailq_reserve_by_idx(idx)->tailq_head)
112 * Utility macro to make looking up a tailqueue for a particular struct easier.
118 * The name of the list type we are using. (Generally this is the same as the
119 * first parameter passed to TAILQ_HEAD macro)
122 * The return value from rte_eal_tailq_lookup, typecast to the appropriate
123 * structure pointer type.
124 * NULL on error, since the tailq_head is the first
125 * element in the rte_tailq_head structure.
127 #define RTE_TAILQ_LOOKUP(name, struct_name) \
128 (struct struct_name *)(&rte_eal_tailq_lookup(name)->tailq_head)
131 * Utility macro to make looking up a tailqueue for a particular struct easier.
134 * The tailq idx defined in rte_tail_t to be given to the tail queue.
137 * The name of the list type we are using. (Generally this is the same as the
138 * first parameter passed to TAILQ_HEAD macro)
141 * The return value from rte_eal_tailq_lookup, typecast to the appropriate
142 * structure pointer type.
143 * NULL on error, since the tailq_head is the first
144 * element in the rte_tailq_head structure.
146 #define RTE_TAILQ_LOOKUP_BY_IDX(idx, struct_name) \
147 (struct struct_name *)(&rte_eal_tailq_lookup_by_idx(idx)->tailq_head)
150 * Reserve a slot in the tailq list for a particular tailq header
151 * Note: this function, along with rte_tailq_lookup, is not multi-thread safe,
152 * and both these functions should only be called from a single thread at a time
155 * The name to be given to the tail queue.
157 * A pointer to the newly reserved tailq entry
159 struct rte_tailq_head *rte_eal_tailq_reserve(const char *name);
162 * Reserve a slot in the tailq list for a particular tailq header
163 * Note: this function, along with rte_tailq_lookup, is not multi-thread safe,
164 * and both these functions should only be called from a single thread at a time
167 * The tailq idx defined in rte_tail_t to be given to the tail queue.
169 * A pointer to the newly reserved tailq entry
171 struct rte_tailq_head *rte_eal_tailq_reserve_by_idx(const unsigned idx);
174 * Dump tail queues to the console.
177 * A pointer to a file for output
179 void rte_dump_tailq(FILE *f);
182 * Lookup for a tail queue.
184 * Get a pointer to a tail queue header of an already reserved tail
185 * queue identified by the name given as an argument.
186 * Note: this function, along with rte_tailq_reserve, is not multi-thread safe,
187 * and both these functions should only be called from a single thread at a time
190 * The name of the queue.
192 * A pointer to the tail queue head structure.
194 struct rte_tailq_head *rte_eal_tailq_lookup(const char *name);
197 * Lookup for a tail queue.
199 * Get a pointer to a tail queue header of an already reserved tail
200 * queue identified by the name given as an argument.
201 * Note: this function, along with rte_tailq_reserve, is not multi-thread safe,
202 * and both these functions should only be called from a single thread at a time
205 * The tailq idx defined in rte_tail_t to be given to the tail queue.
207 * A pointer to the tail queue head structure.
209 struct rte_tailq_head *rte_eal_tailq_lookup_by_idx(const unsigned idx);
215 #endif /* _RTE_TAILQ_H_ */