From eb6eedc04b958c0cf4ffaa662d26f74b8f0ff10e Mon Sep 17 00:00:00 2001 From: Sohyun Lee <sh119@ajou.ac.kr> Date: Wed, 26 Jan 2022 15:55:46 +0900 Subject: [PATCH] lec14 --- lec13/th3.c | 6 ++++-- lec14/prtest.c | 12 ++++++++++++ lec14/th4.c | 35 +++++++++++++++++++++++++++++++++ lec14/threadtest.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 99 insertions(+), 2 deletions(-) create mode 100644 lec14/prtest.c create mode 100644 lec14/th4.c create mode 100644 lec14/threadtest.c diff --git a/lec13/th3.c b/lec13/th3.c index 2ec2f10..ed1a8fa 100644 --- a/lec13/th3.c +++ b/lec13/th3.c @@ -7,14 +7,14 @@ int bbb = 0; void fn_s() { static int a = 0; - printf("== %d %d ==\n",a++, bbb++); + printf("== %d %d ==",a++, bbb++); } void *run (void *arg) { printf("Hello world of POSXI threads.%d\n", (int) (0) ); - for (int i = 0; i < 100; i++) + for (int i = 0; i < 10; i++) { sleep(1); fn_s(); @@ -26,6 +26,8 @@ void *run (void *arg) int main() { int result1; + char bufff[10]; + setvbuf(stdout,bufff, _IOFBF, 10); run((void *) 0); sleep(10); diff --git a/lec14/prtest.c b/lec14/prtest.c new file mode 100644 index 0000000..ae535e9 --- /dev/null +++ b/lec14/prtest.c @@ -0,0 +1,12 @@ +#include <stdio.h> + +int main() +{ + char a; + short b; + int c; + long long d; + + scanf("%hhd %hd %d %lld", &a, &b, &c, &d); + printf("%hhd %hd %d %lld\n", a,b,c,d); +} diff --git a/lec14/th4.c b/lec14/th4.c new file mode 100644 index 0000000..d3d07dd --- /dev/null +++ b/lec14/th4.c @@ -0,0 +1,35 @@ +#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); +} + diff --git a/lec14/threadtest.c b/lec14/threadtest.c new file mode 100644 index 0000000..c0688ec --- /dev/null +++ b/lec14/threadtest.c @@ -0,0 +1,48 @@ +#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 < 1000; 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); +} + -- GitLab