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d28b004768
A common complaint about the module API is that modules can't communicate asynchronously with Emacs. While it isn't possible to call arbitrary Emacs functions asynchronously, writing to a pipe should always be fine and is a pretty low-hanging fruit. This patch implements a function that adapts an existing pipe process. That way, users can use familiar tools like process filters or 'accept-process-output'. * src/module-env-28.h: Add 'open_channel' module function. * src/emacs-module.c (module_open_channel): Provide definition for 'open_channel'. (initialize_environment): Use it. * src/process.c (open_channel_for_module): New helper function. (syms_of_process): Define necessary symbol. * test/src/emacs-module-tests.el (module/async-pipe): New unit test. * test/data/emacs-module/mod-test.c (signal_system_error): New helper function. (signal_errno): Use it. (write_to_pipe): New function running in the background. (Fmod_test_async_pipe): New test module function. (emacs_module_init): Export it. * doc/lispref/internals.texi (Module Misc): Document new module function. * doc/lispref/processes.texi (Asynchronous Processes): New anchor for pipe processes. * etc/NEWS: Document 'open_channel' function.
14 lines
623 B
C
14 lines
623 B
C
/* Add module environment functions newly added in Emacs 28 here.
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Before Emacs 28 is released, remove this comment and start
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module-env-29.h on the master branch. */
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void (*(*EMACS_ATTRIBUTE_NONNULL (1)
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get_function_finalizer) (emacs_env *env,
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emacs_value arg)) (void *) EMACS_NOEXCEPT;
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void (*set_function_finalizer) (emacs_env *env, emacs_value arg,
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void (*fin) (void *) EMACS_NOEXCEPT)
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EMACS_ATTRIBUTE_NONNULL (1);
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int (*open_channel) (emacs_env *env, emacs_value pipe_process)
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EMACS_ATTRIBUTE_NONNULL (1);
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