net: lib: coap_client: Protect initialization with mutex (1ea569d7) · Commits · Wenxi XU / zephyr

subsys/net/lib/coap/coap_client.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@ LOG_MODULE_DECLARE(net_coap, CONFIG_COAP_LOG_LEVEL);
		#define BLOCK1_OPTION_SIZE 4
		#define PAYLOAD_MARKER_SIZE 1

		static K_MUTEX_DEFINE(coap_client_mutex);
		static struct coap_client *clients[CONFIG_COAP_CLIENT_MAX_INSTANCES];
		static int num_clients;
		static K_SEM_DEFINE(coap_client_recv_sem, 0, 1);
		@@ -1006,7 +1007,9 @@ int coap_client_init(struct coap_client client, const char info)
		return -EINVAL;
		}

		k_mutex_lock(&coap_client_mutex, K_FOREVER);
		if (num_clients >= CONFIG_COAP_CLIENT_MAX_INSTANCES) {
		k_mutex_unlock(&coap_client_mutex);
		return -ENOSPC;
		}

		@@ -1015,6 +1018,7 @@ int coap_client_init(struct coap_client client, const char info)
		clients[num_clients] = client;
		num_clients++;

		k_mutex_unlock(&coap_client_mutex);
		return 0;
		}