- 1 year ago
SignalObjectAndWait eqivalent for Linux in a single context switch
The SignalObjectAndWait
function is a Windows-specific function that allows for signaling an object while waiting for another object, all within a single context switch. On Linux, a similar behavior can be achieved using various synchronization mechanisms available in the operating system. One approach is to use a combination of condition variables and mutexes. Here's an example using pthreads in C:
c#include <pthread.h>
pthread_mutex_t mutex;
pthread_cond_t cond;
void* thread_function(void* arg) {
// Wait for the signal from the main thread
pthread_mutex_lock(&mutex);
pthread_cond_wait(&cond, &mutex);
pthread_mutex_unlock(&mutex);
// Perform the desired operation after receiving the signal
return NULL;
}
int main() {
pthread_t thread;
// Initialize the mutex and condition variable
pthread_mutex_init(&mutex, NULL);
pthread_cond_init(&cond, NULL);
// Create the thread
pthread_create(&thread, NULL, thread_function, NULL);
// Signal the thread to continue
pthread_mutex_lock(&mutex);
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
// Wait for the thread to complete
pthread_join(thread, NULL);
// Clean up the mutex and condition variable
pthread_mutex_destroy(&mutex);
pthread_cond_destroy(&cond);
return 0;
}
In this example:
The
pthread_mutex_t
variablemutex
and thepthread_cond_t
variablecond
are initialized.The
thread_function
is created to wait for the signal from the main thread, perform the desired operation, and then return.In the
main
function, the thread is created usingpthread_create
.The main thread signals the created thread to continue using
pthread_cond_signal
.The main thread waits for the created thread to complete using
pthread_join
.The mutex and condition variable are cleaned up using
pthread_mutex_destroy
andpthread_cond_destroy
.
Note that this is a basic example, and you may need to adapt it to your specific use case and requirements. Also, error handling for the pthread functions is omitted for brevity and should be added in a production code.