![]() Limited amount of buffer space, and if too many signals arrive too Rare cases it can run into a problem: generally the fd will have a The byte values give you the signal numbers. In the first approach, we read the data out of the fd's buffer, and You use the fd to wake up when a signal arrives, but then theyĭiffer in how they determine which signal or signals have There are two common ways to use this function. It is up to the library to removeĪny bytes from fd before calling poll or select again. If fd is -1, file descriptor wakeup is disabled. The old wakeup fd is returned (or -1 if file descriptor wakeup was notĮnabled). This can be used byĪ library to wakeup a poll or select call, allowing the signal to be fully Signal number is written as a single byte into the fd. set_wakeup_fd ( fd, *, warn_on_full_buffer = True ) ¶ If the handler raises an exception, it will be raised "out of thin air" in Onwards, you can use the faulthandler module to report on synchronous The same signal again, causing Python to apparently hang. Will return from the signal handler to the C code, which is likely to raise SIGSEGV that are caused by an invalid operation in C code. It makes little sense to catch synchronous errors like SIGFPE or Several functions and signalsĪre not available on these platforms. On WebAssembly platforms wasm32-emscripten and wasm32-wasi, signalsĪre emulated and therefore behave differently. Translated into a KeyboardInterrupt exception if the parent process Installed: SIGPIPE is ignored (so write errors on pipes and socketsĬan be reported as ordinary Python exceptions) and SIGINT is The signal.signal() function allows defining custom handlers to beĮxecuted when a signal is received.
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