| Florin Coras | e86a8ed | 2018-01-05 03:20:25 -0800 | [diff] [blame] | 1 | /* |
| 2 | *------------------------------------------------------------------ |
| 3 | * svm_queue.h - shared-memory queues |
| 4 | * |
| 5 | * Copyright (c) 2009 Cisco and/or its affiliates. |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at: |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | *------------------------------------------------------------------ |
| 18 | */ |
| 19 | |
| 20 | #ifndef included_svm_queue_h |
| 21 | #define included_svm_queue_h |
| 22 | |
| 23 | #include <pthread.h> |
| 24 | |
| 25 | typedef struct _svm_queue |
| 26 | { |
| 27 | pthread_mutex_t mutex; /* 8 bytes */ |
| 28 | pthread_cond_t condvar; /* 8 bytes */ |
| 29 | int head; |
| 30 | int tail; |
| 31 | volatile int cursize; |
| 32 | int maxsize; |
| 33 | int elsize; |
| 34 | int consumer_pid; |
| 35 | int signal_when_queue_non_empty; |
| 36 | char data[0]; |
| 37 | } svm_queue_t; |
| 38 | |
| 39 | svm_queue_t *svm_queue_init (int nels, |
| 40 | int elsize, |
| 41 | int consumer_pid, |
| 42 | int signal_when_queue_non_empty); |
| 43 | void svm_queue_free (svm_queue_t * q); |
| 44 | int svm_queue_add (svm_queue_t * q, u8 * elem, int nowait); |
| 45 | int svm_queue_add2 (svm_queue_t * q, u8 * elem, u8 * elem2, int nowait); |
| 46 | int svm_queue_sub (svm_queue_t * q, u8 * elem, int nowait); |
| 47 | int svm_queue_sub2 (svm_queue_t * q, u8 * elem); |
| 48 | void svm_queue_lock (svm_queue_t * q); |
| 49 | void svm_queue_unlock (svm_queue_t * q); |
| 50 | int svm_queue_is_full (svm_queue_t * q); |
| 51 | int svm_queue_add_nolock (svm_queue_t * q, u8 * elem); |
| 52 | int svm_queue_sub_raw (svm_queue_t * q, u8 * elem); |
| 53 | int svm_queue_add_raw (svm_queue_t * q, u8 * elem); |
| 54 | |
| 55 | /* |
| 56 | * DEPRECATED please use svm_queue_t instead |
| 57 | */ |
| 58 | typedef svm_queue_t unix_shared_memory_queue_t; |
| 59 | |
| 60 | #endif /* included_svm_queue_h */ |
| 61 | |
| 62 | /* |
| 63 | * fd.io coding-style-patch-verification: ON |
| 64 | * |
| 65 | * Local Variables: |
| 66 | * eval: (c-set-style "gnu") |
| 67 | * End: |
| 68 | */ |