#include "shm_socket.h"
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#include "hashtable.h"
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#include "logger_factory.h"
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#include <map>
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#include <cassert>
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#include "bus_error.h"
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static Logger *logger = LoggerFactory::getLogger();
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static void print_msg(char *head, shm_msg_t &msg) {
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// err_msg(0, "%s: key=%d, type=%d\n", head, msg.key, msg.type);
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}
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static pthread_once_t _once_ = PTHREAD_ONCE_INIT;
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static pthread_key_t _perthread_socket_key_;
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static void _destrory_socket_perthread(void *tmp_socket);
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static void _create_socket_key_perthread(void);
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// 检查key是否已经被使用，是返回0, 否返回1
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// static int _shm_socket_check_key(shm_socket_t *socket) {
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// void *tmp_ptr = mm_get_by_key(socket->key);
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// if (tmp_ptr!= NULL && tmp_ptr != (void *)1 && !socket->force_bind ) {
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// bus_errno = EBUS_KEY_INUSED;
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// logger->error("%s. key = %d ", bus_strerror(EBUS_KEY_INUSED), socket->key);
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// return 0;
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// }
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// return 1;
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// }
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// 检查key是否已经被使用， 未被使用则绑定key
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static LockFreeQueue<shm_msg_t> * shm_socket_bind_queue(int key, bool force) {
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hashtable_t *hashtable = mm_get_hashtable();
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LockFreeQueue<shm_msg_t> *queue;
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hashtable_lock(hashtable);
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void *tmp_ptr = hashtable_get(hashtable, key);
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if (tmp_ptr == NULL || tmp_ptr == (void *)1 ) {
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queue = new LockFreeQueue<shm_msg_t>(16);
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hashtable_put(hashtable, key, (void *)queue);
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hashtable_unlock(hashtable);
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return queue;
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} else if(force) {
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hashtable_unlock(hashtable);
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return (LockFreeQueue<shm_msg_t> *) queue;
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}
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hashtable_unlock(hashtable);
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return NULL;
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}
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/**
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* 绑定key到队列，但是并不会创建队列。
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*/
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static LockFreeQueue<shm_msg_t> * shm_socket_attach_queue(int key) {
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LockFreeQueue<shm_msg_t> * queue;
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hashtable_t *hashtable = mm_get_hashtable();
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void *tmp_ptr = hashtable_get(hashtable, key);
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if (tmp_ptr == NULL || tmp_ptr == (void *)1) {
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//logger->error("shm_socket._remote_queue_attach：connet at key %d failed!", key);
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return NULL;
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}
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queue = ( LockFreeQueue<shm_msg_t> *)tmp_ptr;
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// hashtable_unlock(hashtable);
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return queue;
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}
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size_t shm_socket_remove_keys(int keys[], size_t length) {
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hashtable_t *hashtable = mm_get_hashtable();
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LockFreeQueue<shm_msg_t> *mqueue;
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size_t count = 0;
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for(int i = 0; i< length; i++) {
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// 销毁共享内存的queue
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mqueue = (LockFreeQueue<shm_msg_t> *)hashtable_get(hashtable, keys[i]);
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delete mqueue;
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hashtable_remove(hashtable, keys[i]);
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count++;
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}
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return count;
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}
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shm_socket_t *shm_open_socket(shm_socket_type_t socket_type) {
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int s, type;
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pthread_mutexattr_t mtxAttr;
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logger->debug("shm_open_socket\n");
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shm_socket_t *socket = (shm_socket_t *)calloc(1, sizeof(shm_socket_t));
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socket->socket_type = socket_type;
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socket->key = 0;
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socket->force_bind = false;
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socket->queue = NULL;
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s = pthread_mutexattr_init(&mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_init");
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s = pthread_mutexattr_settype(&mtxAttr, PTHREAD_MUTEX_ERRORCHECK);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_settype");
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s = pthread_mutex_init(&(socket->mutex), &mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutex_init");
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s = pthread_mutexattr_destroy(&mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_destroy");
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return socket;
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}
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int shm_close_socket(shm_socket_t *socket) {
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int s;
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logger->debug("shm_close_socket\n");
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if(socket->queue != NULL) {
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delete socket->queue;
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socket->queue = NULL;
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}
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s = pthread_mutex_destroy(&(socket->mutex) );
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if(s != 0) {
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err_exit(s, "shm_close_socket");
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}
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free(socket);
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return 0;
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}
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// int shm_close_socket(shm_socket_t *socket) {
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// // _destrory_socket_perthread((shm_socket_t *)pthread_getspecific(_perthread_socket_key_));
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// return shm_close_socket(socket);;
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// }
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int shm_socket_bind(shm_socket_t *socket, int key) {
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socket->key = key;
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return 0;
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}
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int shm_socket_force_bind(shm_socket_t *socket, int key) {
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socket->force_bind = true;
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socket->key = key;
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return 0;
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}
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int shm_socket_get_key(shm_socket_t *sk){
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return sk->key;
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}
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// 短连接方式发送
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int shm_sendto(shm_socket_t *sockt, const void *buf, const int size,
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const int key, const struct timespec *timeout, const int flag) {
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int s;
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int rv;
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hashtable_t *hashtable = mm_get_hashtable();
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if ((s = pthread_mutex_lock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_sendto : pthread_mutex_lock");
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if (sockt->queue == NULL) {
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if (sockt->key == 0) {
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sockt->key = hashtable_alloc_key(hashtable);
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}
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sockt->queue = shm_socket_bind_queue( sockt->key, sockt->force_bind);
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if(sockt->queue == NULL ) {
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logger->error("%s. key = %d", bus_strerror(EBUS_KEY_INUSED), sockt->key);
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return EBUS_KEY_INUSED;
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}
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}
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if ((s = pthread_mutex_unlock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_sendto : pthread_mutex_unlock");
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// There is some case where a sockt need to send to himeself, for example when bus server need to stop, he need to send himself
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// a top message.
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if (key == sockt->key) {
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logger->error( "can not send to your self!");
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return EBUS_SENDTO_SELF;
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}
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LockFreeQueue<shm_msg_t> *remoteQueue;
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if ((remoteQueue = shm_socket_attach_queue(key)) == NULL) {
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bus_errno = EBUS_CLOSED;
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logger->error("sendto key %d failed, %s", key, bus_strerror(bus_errno));
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return EBUS_CLOSED;
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}
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shm_msg_t dest;
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dest.type = SHM_COMMON_MSG;
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dest.key = sockt->key;
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dest.size = size;
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dest.buf = mm_malloc(size);
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memcpy(dest.buf, buf, size);
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rv = remoteQueue->push(dest, timeout, flag);
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if (rv == 0) {
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printf("%d sendto %d suc.\n", shm_socket_get_key(sockt), key);
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return 0;
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} else {
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mm_free(dest.buf);
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if(rv == ETIMEDOUT)
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return EBUS_TIMEOUT;
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else {
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logger->debug("====%d sendto key %d failed %s", shm_socket_get_key(sockt), key, bus_strerror(rv));
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return rv;
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}
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}
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}
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// 短连接方式接受
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int shm_recvfrom(shm_socket_t *sockt, void **buf, int *size, int *key, const struct timespec *timeout, int flag) {
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int s;
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int rv;
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hashtable_t *hashtable = mm_get_hashtable();
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if ((s = pthread_mutex_lock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_recvfrom : pthread_mutex_lock");
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if (sockt->queue == NULL) {
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if (sockt->key == 0) {
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sockt->key = hashtable_alloc_key(hashtable);
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}
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sockt->queue = shm_socket_bind_queue( sockt->key, sockt->force_bind);
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if(sockt->queue == NULL ) {
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logger->error("%s. key = %d", bus_strerror(EBUS_KEY_INUSED), sockt->key);
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return EBUS_KEY_INUSED;
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}
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}
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if ((s = pthread_mutex_unlock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_recvfrom : pthread_mutex_unlock");
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shm_msg_t src;
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rv = sockt->queue->pop(src, timeout, flag);
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if (rv == 0) {
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if(buf != NULL) {
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void *_buf = malloc(src.size);
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memcpy(_buf, src.buf, src.size);
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*buf = _buf;
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}
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if(size != NULL)
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*size = src.size;
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if(key != NULL)
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*key = src.key;
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mm_free(src.buf);
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return 0;
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} else {
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if(rv == ETIMEDOUT)
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return EBUS_TIMEOUT;
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else {
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logger->debug("%d shm_recvfrom failed %s", shm_socket_get_key(sockt), bus_strerror(rv));
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return rv;
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}
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}
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}
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/* Free thread-specific data buffer */
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static void _destrory_socket_perthread(void *tmp_socket)
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{
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int rv;
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if(tmp_socket == NULL)
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return;
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logger->debug("%d destroy tmp socket\n", pthread_self());
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shm_close_socket((shm_socket_t *)tmp_socket);
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rv = pthread_setspecific(_perthread_socket_key_, NULL);
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if ( rv != 0) {
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logger->error(rv, "shm_sendandrecv : pthread_setspecific");
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exit(1);
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}
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}
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/* One-time key creation function */
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static void _create_socket_key_perthread(void)
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{
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int s;
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/* Allocate a unique thread-specific data key and save the address
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of the destructor for thread-specific data buffers */
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s = pthread_key_create(&_perthread_socket_key_, _destrory_socket_perthread);
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//s = pthread_key_create(&_perthread_socket_key_, NULL);
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if (s != 0) {
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logger->error(s, "pthread_key_create");
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abort(); /* dump core and terminate */
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exit(1);
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}
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}
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// use thread local
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int _shm_sendandrecv_thread_local(shm_socket_t *sockt, const void *send_buf,
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const int send_size, const int send_key, void **recv_buf,
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int *recv_size, const struct timespec *timeout, int flags) {
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int recv_key;
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int rv;
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// 用thread local 保证每个线程用一个独占的socket接受对方返回的信息
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shm_socket_t *tmp_socket;
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rv = pthread_once(&_once_, _create_socket_key_perthread);
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if (rv != 0) {
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logger->error(rv, "shm_sendandrecv pthread_once");
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exit(1);
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}
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tmp_socket = (shm_socket_t *)pthread_getspecific(_perthread_socket_key_);
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if (tmp_socket == NULL)
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{
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/* If first call from this thread, allocate buffer for thread, and save its location */
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logger->debug("%ld create tmp socket\n", (long)pthread_self() );
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tmp_socket = shm_open_socket(SHM_SOCKET_DGRAM);
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rv = pthread_setspecific(_perthread_socket_key_, tmp_socket);
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if ( rv != 0) {
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logger->error(rv, "shm_sendandrecv : pthread_setspecific");
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exit(1);
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}
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}
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if ((rv = shm_sendto(tmp_socket, send_buf, send_size, send_key, timeout, flags)) == 0) {
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rv = shm_recvfrom(tmp_socket, recv_buf, recv_size, &recv_key, timeout, flags);
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if(rv != 0) {
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logger->error("_shm_sendandrecv_thread_local : %s\n", bus_strerror(rv));
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}
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else if(rv == 0 ) {
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logger->debug("======%d use tmp_socket %d, send to %d, receive from %d\n", shm_socket_get_key(sockt), shm_socket_get_key(tmp_socket), send_key, recv_key);
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if(recv_key == shm_socket_get_key(sockt)) {
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logger->debug("=====收到了自己发给自己的消息\n");
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}
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assert( send_key == recv_key);
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if(send_key != recv_key) {
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logger->error( "_shm_sendandrecv_alloc_new: send key expect to equal to recv key! send key =%d , recv key=%d", send_key, recv_key);
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exit(1);
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}
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}
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return rv;
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} else {
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return rv;
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}
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}
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int _shm_sendandrecv_alloc_new(shm_socket_t *sockt, const void *send_buf,
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const int send_size, const int send_key, void **recv_buf,
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int *recv_size, const struct timespec *timeout, int flags) {
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int recv_key;
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int rv;
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// 用thread local 保证每个线程用一个独占的socket接受对方返回的信息
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shm_socket_t *tmp_socket;
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if (sockt->socket_type != SHM_SOCKET_DGRAM) {
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logger->error( "shm_socket.shm_sendandrecv: Can't invoke shm_sendandrecv method in a %d type socket "
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"which is not a SHM_SOCKET_DGRAM socket ",
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sockt->socket_type);
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exit(1);
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}
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/* If first call from this thread, allocate buffer for thread, and save its location */
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// logger->debug("%d create tmp socket\n", pthread_self() );
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tmp_socket = shm_open_socket(SHM_SOCKET_DGRAM);
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if ((rv = shm_sendto(tmp_socket, send_buf, send_size, send_key, timeout, flags)) == 0) {
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rv = shm_recvfrom(tmp_socket, recv_buf, recv_size, &recv_key, timeout, flags);
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if(rv != 0) {
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printf("_shm_sendandrecv_alloc_new : %s\n", bus_strerror(rv));
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}
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else if(rv == 0 ) {
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printf("======%d use tmp_socket %d, send to %d, receive from %d\n", shm_socket_get_key(sockt), shm_socket_get_key(tmp_socket), send_key, recv_key);
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if(recv_key == shm_socket_get_key(sockt)) {
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printf("=====收到了自己发给自己的消息\n");
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}
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assert( send_key == recv_key);
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if(send_key != recv_key) {
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err_exit(0, "_shm_sendandrecv_alloc_new: send key expect to equal to recv key! send key =%d , recv key=%d", send_key, recv_key);
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}
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}
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}
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shm_close_socket(tmp_socket);
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return rv;
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}
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int shm_sendandrecv(shm_socket_t *socket, const void *send_buf,
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const int send_size, const int send_key, void **recv_buf,
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int *recv_size, const struct timespec *timeout, int flags) {
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return _shm_sendandrecv_thread_local(socket, send_buf, send_size, send_key,recv_buf, recv_size, timeout, flags);
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}
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// ============================================================================================================
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