lec14

lec12/Makefile.2

+main: main.o fx_s15_16.o
+	cc main.o fx_s15_16.o -o main
+main.o: main.c fx_head.h fx_s15_16.h
+	cc -c main.c
+fx_s15_16.o: fx_head.h fx_s15_16.c
+	cc -c fx_s15_16.c
+clean:
+	rm main *.o *.out

lec13/forktest.c

+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main()
+{
+	int a = 0; 
+	pid_t pid ,pid2;
+       	pid = fork(); 
+	pid2 = fork(); 
+	for (int i = 0; i < 100; i++)
+	{
+		sleep(1);
+		if (pid == 0)	
+			printf("PID %d : PID2 %d : A=%d : i=%d : \n", pid, pid2,  a++, i);
+	}
+}

lec13/lserr.txt

+ls: cannot access 'zzz': No such file or directory

lec13/lsout.txt

+-rw-r--r-- 1 pcc004 pcc 127  1월 25 15:22 test.c

lec13/lsoutierr.txt

+ls: cannot access 'zzz': No such file or directory
+-rw-r--r-- 1 pcc004 pcc 127  1월 25 15:22 test.c

lec13/output.txt

+hello

lec13/test.c

+#include <stdio.h>
+#include <stdlib.h>
+
+int main(){
+	printf("System Call: %d\n", system("ls -li test.c zzz"));
+	return(100);
+}

lec13/th3.c

+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+int bbb = 0;
+void fn_s()
+{
+    char bufff[10];
+    static int a = 0;
+    setvbuf(stdout, bufff, _IOFBF, 10);
+    printf("== %d %d ==",a++, bbb++);
+}
+
+void *run (void *arg)
+{
+    printf("Hello world of POSIX threads.%d\n", (int) (0) );
+    for (int i = 0; i < 10; i++)
+    {
+		sleep(1);
+        fn_s();
+    }
+    return 0;
+}
+
+int main()
+{
+    int result1;
+    run((void *) 0);
+    printf("Thread return %d at the end\n", result1);
+}

lec13/thread2.c

+#include <pthread.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+
+int bbb = 0; 
+
+void fn_s()
+{
+    static int a = 0; 
+    printf("== %d %d ==",a++, bbb++);
+}
+
+
+void *run (void *arg)
+{
+    printf("Hello world of POSXI threads.%d\n", (int) pthread_self() );
+    for (int i = 0; i < 100; i++)
+	{
+		usleep(100); 
+		fn_s(); 
+	}
+    return 0;
+
+}
+
+int main()
+{
+	pthread_t thread1;
+	int result1;
+	pthread_create(&thread1, NULL, run, NULL );
+	run((void *) 0); 
+	pthread_join(thread1, (void **) &result1);
+	printf("Thread return %d at the end\n", result1);
+}
+

lec13/threadtest.c

+#include <pthread.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int bbb = 0; 
+
+void fn_s()
+{
+	static int a = 0; 
+    printf("== %d %d ==",a++, bbb++);
+}
+
+
+void *run (void *arg)
+{
+    printf("Hello world of POSXI threads.%d\n", (int) pthread_self() );
+	for (int i = 0; i < 100; i++)
+	{
+		sleep(1); 
+		fn_s(); 
+	}
+    return 0;
+
+}
+
+int main()
+{
+	pthread_t thread1;
+	// pthread_t thread2;
+	// pthread_t thread3;
+	int result1;
+	// int result2;
+	pthread_create(&thread1, NULL, run, NULL );
+	// pthread_create(&thread2, NULL, run, NULL );
+	// pthread_create(&thread3, NULL, run, NULL );
+	pthread_join(thread1, &result1);
+	// pthread_join(thread2, &result2);
+	printf("Thread return %d at the end\n", result1);
+	// printf("Thread return %d at the end\n", result2);
+}
+

lec14/prtest.c

+#include <stdio.h>
+
+int main()
+{
+	char a;
+	short b;
+	int c;
+	long long d;
+	
+	scanf("%d %d %d %d", &a, &b, &c, &d);
+	printf("%d %d %d %d\n", a, b, c, d);
+}

lec14/th4.c

+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int bbb = 0; 
+
+void fn_s()
+{
+    static int a = 0; 
+    printf("== %d %d ==",a++, bbb++);
+	fflush(stdout);
+}
+
+
+void *run (void *arg)
+{
+    printf("Hello world of POSIX threads.%d\n", (int) (0) );
+    for (int i = 0; i < 10; i++)
+	{
+		sleep(1); 
+		fn_s(); 
+	}
+    return 0;
+
+}
+
+int main()
+{
+	int result1;
+    	char bufff[10]; 
+    	setvbuf(stdout,bufff,  _IONBF, 10); 
+	run((void *) 0); 
+	printf("Thread return %d at the end\n", result1);
+}

lec14/threadtest.c

+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+int bbb = 0; 
+
+void fn_s()
+{
+	static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+    	static int a = 0; 
+    	printf("<= %d %d =>",a, bbb);
+    	pthread_mutex_lock(&mutex);
+	a++; bbb++;
+    	pthread_mutex_unlock(&mutex);
+}
+
+
+void *run (void *arg)
+{
+    printf("Hello world of POSXI threads.%d\n", (int) pthread_self() );
+    for (int i = 0; i < 1000000; i++)
+	{
+		//usleep(10000); 
+		fn_s(); 
+	}
+    return 0;
+
+}
+
+int main()
+{
+	pthread_t thread1;
+	pthread_t thread2;
+	pthread_t thread3;
+	int result1, result2, result3;
+
+	pthread_create(&thread1, NULL, run, NULL );
+	pthread_create(&thread2, NULL, run, NULL );
+	pthread_create(&thread3, NULL, run, NULL );
+	run((void *) 0); 
+	pthread_join(thread1, (void **) &result1);
+	pthread_join(thread2, (void **) &result2);
+	pthread_join(thread3, (void **) &result3);
+	printf("\nThread return %d at the end\n", result1);
+}
+