Exemplos de is_write_lockable em C++ (Cpp)

Exemplo n.º 1

Arquivo: test_lock_end.c Projeto: jinguoliang/helloworld

main()
{
	char buf[1];
	int fd=open("./test.tmp",O_RDWR);

	buf[1]='c';

	write(fd,buf,1);
	write_lock(fd, -1, SEEK_END, 0);
	write(fd,buf,1);
	un_lock(fd, 0, SEEK_END,0);
	write(fd,buf,1);

	if(fork()==0){
		if(is_write_lockable(fd, -2, SEEK_END, 1))
			puts("the last third is not locked");
		else
			puts("the last third is locked");

		if(is_write_lockable(fd, -1, SEEK_END, 1))
			puts("the last third is not locked");
		else
			puts("the last third is locked");

		if(is_write_lockable(fd, -0, SEEK_END, 1))
			puts("the last third is not locked");
		else
			puts("the last third is locked");

	}
}

Exemplo n.º 2

Arquivo: lock_example.c Projeto: Sanji-IO/sanji-controller

int main()
{
	int fd;
	int pid;

	fd = open(LOCK_FILE, O_WRONLY | O_CREAT);

	while (1) {
		pid = is_write_lockable(fd, 0, SEEK_SET, 0);
		if (!pid) break;
		printf("File is locked by pid(%d)\n", pid);
		sleep(1);
	}

	write_lock(fd, 0, SEEK_SET, 0);
	printf("Lock!\n");

	sleep(10);

	write_unlock(fd, 0, SEEK_SET, 0);
	printf("Unlock!\n");

	close(fd);

	return 0;
}