Add ledThread assignment

08_14_mutex/1.mytwothread.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pthread.h>
+
+void * thread_function(void *);
+
+int Counter=0;
+
+int main(void)
+{
+	pthread_t tid1, tid2;
+	void *thread_result;
+
+	if(pthread_create(&tid1, NULL, thread_function,  "thread1")!=0) {
+		perror("pthread_create");
+		exit(1);
+	}
+	if(pthread_create(&tid2, NULL, thread_function, "thread2")!=0) {
+		perror("pthread_create");
+		exit(1);
+	}
+
+	if(pthread_join(tid1, &thread_result)!=0) {
+		perror("pthread_join");
+		exit(1);
+	}
+	if(pthread_join(tid2, &thread_result)!=0) {
+		perror("pthread_join");
+		exit(1);
+	}
+
+	printf(" thread result : %s\n", (char *) thread_result);
+	return 0;
+}
+
+void * thread_function(void * arg)
+{
+	int temp;
+	int i, j;
+	char buffer[80];
+
+	printf("thread_function called\n");
+	for(i=0; i<20; i++) {
+		sprintf(buffer, "%s : Counter : from %d to ", (char*)arg, Counter); //sprintf : 배열에 찍는것
+		write(1, buffer, strlen(buffer));
+
+		temp=Counter;
+		temp = temp+1;
+
+// delay
+		for(j=0; j<500000; j++);
+
+		Counter=temp;
+
+		sprintf(buffer, " %d\n", Counter);
+		write(1, buffer, strlen(buffer));
+
+	}
+	pthread_exit("thread end");
+}

08_14_mutex/2.mymutexthread_st.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <errno.h>
+
+#include <unistd.h>
+#include <sys/syscall.h> 
+
+void * thread_function(void *);
+
+int Counter=0;
+#ifndef NOMUTEX
+pthread_mutex_t mutex_id;
+#endif
+
+int main(void)
+{
+	pthread_t tid1, tid2;
+	void *thread_result;
+
+#ifndef NOMUTEX
+	if(pthread_mutex_init(&mutex_id, NULL) != 0){
+		perror("pthread_mutex_init");
+		exit(errno);
+	}
+#endif
+
+	if(pthread_create(&tid1, NULL, thread_function, "thread1")!=0) {
+		perror("pthread_create");
+		exit(1);
+	}
+	
+	if(pthread_create(&tid2, NULL, thread_function, "thread2")!=0) {
+		perror("pthread_create");
+		exit(1);
+	}
+	
+	if(pthread_join(tid1, &thread_result)!=0) {
+		perror("pthread_join");
+		exit(1);
+	}
+	if(pthread_join(tid2, &thread_result)!=0) {
+		perror("pthread_join");
+		exit(1);
+	}
+	
+#ifndef NOMUTEX
+	pthread_mutex_lock(&mutex_id);
+#endif
+
+	printf(" thread result : %s\n", (char *) thread_result);
+	return 0;
+}
+
+void * thread_function(void * arg)
+{
+	int temp;
+	int i, j;
+	char buffer[80];
+
+	printf("thread_function called\n");	
+	for(i=0; i<8; i++) {
+#ifndef NOMUTEX
+		pthread_mutex_lock(&mutex_id);
+#endif
+		sprintf(buffer, "%s: CountRelay: from %d to ", (char*)arg, Counter);
+		write(1, buffer, strlen(buffer));
+
+		temp=Counter;
+		temp = temp+1;
+// delay
+		for(j=0; j<5000000; j++);
+
+		Counter=temp;
+
+		sprintf(buffer, "%d\n", Counter);
+		write(1, buffer, strlen(buffer));
+		
+#ifndef NOMUTEX
+		pthread_mutex_unlock(&mutex_id);
+#endif
+	}
+	// getchar();
+	pthread_exit("thread end");
+}

08_14_mutex/ledThreads/Makefile

+SRCS := led_main.c led_green.c led_yellow.c
+OBJS := $(SRCS:.c=.o)
+CC := gcc
+#컴파일 옵션
+CFLAGS = -Wall -g
+#linking 옵션
+LDFLAGS = -lpthread -lwiringPi
+
+led_main : $(OBJS)
+	$(CC) -o $@ $^ ${LDFLAGS}
+
+# dummy target
+clean : 
+	-rm $(OBJS)
+	-rm led_main
+dep :
+	gccmakedep ${SRCS}
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08_14_mutex/ledThreads/led.h

+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <wiringPi.h>
+#include <pthread.h>
+
+#define LED_RED 1
+#define LED_GREEN 4
+#define LED_YELLOW 5
+
+void* led_yellow_task(void* args);
+void* led_green_task(void* args);
\ No newline at end of file

08_14_mutex/ledThreads/led_green.c

+#include "led.h"
+
+void * led_green_task(void *arg)
+{
+	int i;
+	pinMode(LED_GREEN, OUTPUT);
+	
+	for(i=0; i<(int)arg; i++) {
+		digitalWrite(LED_GREEN, HIGH);
+        printf("GREEN ON!\n");
+		sleep(2);
+		digitalWrite(LED_GREEN, LOW);
+        printf("GREEN OFF!\n");
+		sleep(2);
+	}
+	pthread_exit(arg);
+}
\ No newline at end of file

08_14_mutex/ledThreads/led_main.c

+#include "led.h"
+
+void led_red_task()
+{
+	pinMode(LED_RED, OUTPUT);
+	
+	for(int i=0; i<10; i++) {
+		digitalWrite(LED_RED, HIGH);
+        printf("RED ON!\n");
+		sleep(1);
+		digitalWrite(LED_RED, LOW);
+        printf("RED OFF!\n");
+		sleep(1);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int gno;
+    int count;
+    pthread_t tid_Y, tid_G;
+	
+	if(argc < 2) {
+        wiringPiSetup();
+	    led_red_task();
+	}
+    else{
+        gno = atoi(argv[1]);
+        count = atoi(argv[2]);
+
+        wiringPiSetup();
+        
+        if (gno == 1) {
+            led_red_task();
+            if (pthread_create(&tid_G, NULL, led_green_task, (void*)count) != 0)
+            {
+                perror("pthread_create");
+                exit(1);
+            }
+        } else if (gno == 2) {
+            led_red_task();
+            if (pthread_create(&tid_Y, NULL, led_yellow_task, (void*)count) != 0)
+            {
+                perror("pthread_create");
+                exit(1);
+            }
+        } else if(gno == 3){
+            led_red_task();
+            if (pthread_create(&tid_Y, NULL, led_yellow_task, (void*)count) != 0)
+            {
+                perror("pthread_create");
+                exit(1);
+            }
+            if (pthread_create(&tid_G, NULL, led_green_task, (void*)count) != 0)
+            {
+                perror("pthread_create");
+                exit(1);
+            }
+        }
+    }
+    pthread_exit(NULL);
+    return 0;
+}
+
+
+
+

08_14_mutex/ledThreads/led_yellow.c

+#include "led.h"
+
+void * led_yellow_task(void *arg)
+{
+	int i;
+	pinMode(LED_YELLOW, OUTPUT);
+	
+	for(i=0; i<(int)arg; i++) {
+		digitalWrite(LED_YELLOW, HIGH);
+        printf("YELLOW ON!\n");
+		sleep(3);
+		digitalWrite(LED_YELLOW, LOW);
+        printf("YELLOW OFF!\n");
+		sleep(3);
+	}
+    pthread_exit(arg);
+
+}
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