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38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
/** \file iothread.h
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Handles IO that may hang.
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*/
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#ifndef FISH_IOTHREAD_H
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#define FISH_IOTHREAD_H
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/**
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Runs a command on a thread.
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\param handler The function to execute on a background thread. Accepts an arbitrary context pointer, and returns an int, which is passed to the completionCallback.
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\param completionCallback The function to execute on the main thread once the background thread is complete. Accepts an int (the return value of handler) and the context.
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\param context A arbitary context pointer to pass to the handler and completion callback.
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\return A sequence number, currently not very useful.
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*/
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int iothread_perform_base(int (*handler)(void *), void (*completionCallback)(void *, int), void *context);
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/**
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Gets the fd on which to listen for completion callbacks.
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\return A file descriptor on which to listen for completion callbacks.
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*/
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int iothread_port(void);
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/** Services one iothread competion callback. */
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void iothread_service_completion(void);
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/** Waits for all iothreads to terminate. */
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void iothread_drain_all(void);
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/** Helper template */
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template<typename T>
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int iothread_perform(int (*handler)(T *), void (*completionCallback)(T *, int), T *context) {
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return iothread_perform_base((int (*)(void *))handler, (void (*)(void *, int))completionCallback, static_cast<void *>(context));
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}
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#endif
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