sleep

I am developing a multithreaded application that makes use of POSIX Threads . I am using threads for doing a periodical job and for that purpose I am using usleep(3) to suspend thread execution. My question is how can I cancel usleep() timer from the main thread, I tried pthread_kill(thread, SIGALRM) but it has a global effect which results in termination of the main application (by default). Here is my pseudo code: void threaded_task(void *ptr) { initialize(); while(running) { do_the_work(); usleep(some_interval); } clean_up(); release_resources(); } And here is the pseudo function that is

I've got two reasons to use a sleep function: first, to automatically send a confirmation email to a client 20 minutes after they contact us. I don't want to use cron jobs because I want it to be exactly 20 minutes (and I'm sick of my web server sending me emails telling me they initiated a cron job.....a new email every 20 minutes!) Second reason: I've heard of people sending out mass emails using the sleep function. Since my server will only allow 100 emails an hour, I want to use the sleep function to have the script sleep for an hour then continue where it picked up. My question is this:

I am trying to delay events in my method by using a timer, however i do not necessarily understand how to use a timer to wait. I set up my timer to be 2 seconds, but when i run this code the last call runs without a 2 second delay. Timer timer = new Timer(); timer.Tick += new EventHandler(timer_Tick); // Everytime timer ticks, timer_Tick will be called timer.Interval = (1000) * (2); // Timer will tick evert second timer.Enabled = true; // Enable the timer void timer_Tick(object sender, EventArgs e) { timer.Stop(); } private void button1_Click(object sender, EventArgs e) { label1.Text = "first"

Well, this must be a silly one. Here below is a can-not-be-simpler code in C. It can not compile saying "undefined reference to sleep". But I think I include all system header I need... #include <stdio.h> #include <unistd.h> int main() { printf("Test starts.\n"); sleep(1); printf("Test ends.\n"); return 1; } wazabit Try this at the top: #ifdef __unix__ # include <unistd.h> #elif defined _WIN32 # include <windows.h> #define sleep(x) Sleep(1000 * (x)) #endif This code will allow you to use two different functions under the same name, that do quite the same thing. And it compiles under different

Is there a library in Java that does the following? A thread should repeatedly sleep for x milliseconds until a condition becomes true or the max time is reached. This situation mostly occurs when a test waits for some condition to become true. The condition is influenced by another thread . [EDIT]Just to make it clearer, I want the test to wait for only X ms before it fails. It cannot wait forever for a condition to become true. I am adding a contrived example. class StateHolder{ boolean active = false; StateHolder(){ new Thread(new Runnable(){ public void run(){ active = true; } }, "State

I'm writing a program in C++. I've noticed that it's gaining a number of threads whose purpose is to do something at intervals, there are 3 or 4 of them. I decided to refactor by writing a scheduler service that the other places that use these threads could subscribe to, which should reduce the number of extra event threads I have running at any time to just one. I don't have any code that uses this yet; before I start writing it I'd like to know if it's possible, and get some feedback on my design. A brief description of what I'd like to accomplish is this: To add an event Caller provides an

I am developing an app in Xcode on Mac and would like to know the event which is fired when the mac gets back from sleep. AwakeFromNib doesn't seem to work. Thanks ! Laurent Crivello Just found it: - (void) receiveWakeNote: (NSNotification*) note { NSLog(@"receiveSleepNote: %@", [note name]); } - (void) fileNotifications { //These notifications are filed on NSWorkspace's notification center, not the default // notification center. You will not receive sleep/wake notifications if you file //with the default notification center. [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: