add libc_mq test.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1092 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/libc/mq.c

+#include <pthread.h>
+#include <mqueue.h>
+#include <sys/fcntl.h>
+
+void child(void* parameter)
+{
+	char msg[16];
+	ssize_t len;
+	mqd_t mq;
+	int i;
+	char expect;
+	
+	printf("Child here!\n");
+	
+	if((mq = mq_open("Q001", O_RDONLY, 0, 0)) == -1)
+	{
+		printf("mq_open = %d\n", errno);
+		pthread_exit(0);
+	}
+	else printf("mq = %x\n", &mq);
+
+	for(expect = 'V'; expect <= 'Z'; ++expect)
+	{
+		memset(msg, 0, sizeof(msg));
+		printf("Child waiting...\n");
+		if((len = mq_receive(mq, msg, sizeof(msg), 0)) == -1)
+		{
+			printf("mq_receive = %d\n", errno);
+			pthread_exit(0);
+		}
+		else printf("GOT MESSAGE %c!\n", expect);
+
+		if(len != 8)
+			printf("expected len 8 got %d\n", len);
+		
+		for(i = 0; i < 8; ++i)
+			if(msg[i] != expect)
+				printf("msg[%d] got %c expected %c\n", i, msg[i], expect);
+	}
+	
+	if(mq_close(mq) == -1)
+		printf("mq_close failed\n");
+			
+	printf("child done\n");
+	pthread_exit(0);
+}
+
+
+void send(void* parameter)
+{
+	mqd_t mq;
+	char msg[8];
+
+	printf("Send here!\n");
+
+	if((mq = mq_open("Q001", O_WRONLY, 0, 0)) == -1)
+	{
+		printf("mq_open = %d\n", errno);
+		pthread_exit(0);
+	}	
+	else printf("mq = %x\n", &mq);
+
+	/* task will be blocked waiting for message */	
+	memset(msg, 'Z', 8);
+	if(mq_send(mq, msg, 8, 0) == -1)
+		printf("mq_send = %d\n", errno);
+
+	if(mq_close(mq) == -1)
+		printf("mq_close failed\n");
+
+	printf("Send done\n");
+	pthread_exit(0);
+}
+
+void test_thread(void* parameter)
+{
+	struct mq_attr attr;
+	mqd_t mq;
+	char msg[8];
+	pthread_t pthrId; 
+	
+	printf("Main here!\n");
+
+	attr.mq_flags	= 0;
+	attr.mq_maxmsg	= 3;
+	attr.mq_msgsize	= 16;
+	if((mq = mq_open("Q001", O_CREAT | O_RDWR, 0, &attr)) == -1)
+	{
+		printf("mq_open = %d\n", errno);
+		pthread_exit(0);
+	}
+	else printf("mq = %x\n", &mq);
+	
+	memset(msg, 'V', 8);
+	if(mq_send(mq, msg, 8, 0) == -1)
+		printf("mq_send = %d\n", errno);
+
+	memset(msg, 'W', 8);
+	if(mq_send(mq, msg, 8, 0) == -1)
+		printf("mq_send = %d\n", errno);
+
+	memset(msg, 'X', 8);
+	if(mq_send(mq, msg, 8, 0) == -1)
+		printf("mq_send = %d\n", errno);
+
+	if(pthread_create(&pthrId, 0, &child, 0)!=0)
+	{
+		printf("pthread_create Child = %d\n", errno);
+		pthread_exit(0);
+	}
+
+	/* Should block */
+	printf("send Y\n");
+	memset(msg, 'Y', 8);
+	if(mq_send(mq, msg, 8, 0) == -1)
+		printf("mq_send = %d\n", errno);
+	else printf("sent Y\n");
+
+	if(pthread_create(&pthrId, 0, send, 0)!=0)
+	{
+		printf("pthread_create Send = %d\n", errno);
+		pthread_exit(0);
+	}
+
+	if(mq_close(mq) == -1)
+		printf("mq_close failed\n");
+
+	printf("main done\n");
+	pthread_exit(0);
+}
+
+#include <finsh.h>
+void libc_mq()
+{
+	rt_thread_t tid;
+
+	tid = rt_thread_create("mqtest", test_thread, RT_NULL, 
+		2048, 20, 5);
+	if (tid != RT_NULL)
+	{
+		rt_thread_startup(tid);
+	}
+}
+FINSH_FUNCTION_EXPORT(libc_mq, mqueue test);