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Refine interface for janet's new event loop.

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Infer the current root fiber and force user to
allocate state for async events.
This commit is contained in:
Calvin Rose
2023-10-08 18:25:46 -05:00
parent a775a89e01
commit 4139e426fe
4 changed files with 89 additions and 76 deletions
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46
src/include/janet.h
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@@ -596,8 +596,7 @@ typedef enum {
JANET_ASYNC_EVENT_READ = 6,
JANET_ASYNC_EVENT_WRITE = 7,
JANET_ASYNC_EVENT_COMPLETE = 8, /* Used on windows for IOCP */
JANET_ASYNC_EVENT_FAILED = 9, /* Used on windows for IOCP */
JANET_ASYNC_EVENT_USER = 10
JANET_ASYNC_EVENT_FAILED = 9 /* Used on windows for IOCP */
} JanetAsyncEvent;
typedef enum {
@@ -606,9 +605,7 @@ typedef enum {
JANET_ASYNC_LISTEN_BOTH
} JanetAsyncMode;
/* Typedefs */
typedef struct JanetStream JanetStream;
typedef void (*JanetEVCallback)(JanetFiber *fiber, JanetAsyncEvent event);
/* Wrapper around file descriptors and HANDLEs that can be polled. */
struct JanetStream {
@@ -620,9 +617,24 @@ struct JanetStream {
const void *methods; /* Methods for this stream */
};
typedef void (*JanetEVCallback)(JanetFiber *fiber, JanetAsyncEvent event);
/* Start listening for events from a stream on the current root fiber. After
* calling this, users should call janet_await() before returning from the
* current C Function. This also will call janet_await.
* mode is which events to listen for, and callback is the function pointer to
* call when ever an event is sent from the event loop. state is an optional (can be NULL)
* pointer to data allocated with janet_malloc. This pointer will be passed to callback as
* fiber->ev_state. It will also be freed for you by the runtime when the event loop determines
* it can no longer be referenced. On windows, the contents of state MUST contained an OVERLAPPED struct. */
JANET_API JANET_NO_RETURN void janet_async_start(JanetStream *stream, JanetAsyncMode mode, JanetEVCallback callback, void *state);
/* Do not send any more events to the given callback. Call this after scheduling fiber to be resume
* or canceled. */
JANET_API void janet_async_end(JanetFiber *fiber);
JANET_API void *janet_async_start(JanetFiber *fiber, JanetStream *stream,
JanetAsyncMode mode, JanetEVCallback callback, size_t data_size);
/* Needed for windows to mark a fiber as waiting for an IOCP completion event. Noop on other platforms. */
JANET_API void janet_async_in_flight(JanetFiber *fiber);
#endif
@@ -1488,22 +1500,22 @@ JANET_API void janet_ev_post_event(JanetVM *vm, JanetCallback cb, JanetEVGeneric
JANET_API void janet_ev_default_threaded_callback(JanetEVGenericMessage return_value);
/* Read async from a stream */
JANET_API void janet_ev_read(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);
JANET_API void janet_ev_readchunk(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);
JANET_NO_RETURN JANET_API void janet_ev_read(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);
JANET_NO_RETURN JANET_API void janet_ev_readchunk(JanetStream *stream, JanetBuffer *buf, int32_t nbytes);
#ifdef JANET_NET
JANET_API void janet_ev_recv(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
JANET_API void janet_ev_recvchunk(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
JANET_API void janet_ev_recvfrom(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
JANET_NO_RETURN JANET_API void janet_ev_recv(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
JANET_NO_RETURN JANET_API void janet_ev_recvchunk(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
JANET_NO_RETURN JANET_API void janet_ev_recvfrom(JanetStream *stream, JanetBuffer *buf, int32_t nbytes, int flags);
#endif
/* Write async to a stream */
JANET_API void janet_ev_write_buffer(JanetStream *stream, JanetBuffer *buf);
JANET_API void janet_ev_write_string(JanetStream *stream, JanetString str);
JANET_NO_RETURN JANET_API void janet_ev_write_buffer(JanetStream *stream, JanetBuffer *buf);
JANET_NO_RETURN JANET_API void janet_ev_write_string(JanetStream *stream, JanetString str);
#ifdef JANET_NET
JANET_API void janet_ev_send_buffer(JanetStream *stream, JanetBuffer *buf, int flags);
JANET_API void janet_ev_send_string(JanetStream *stream, JanetString str, int flags);
JANET_API void janet_ev_sendto_buffer(JanetStream *stream, JanetBuffer *buf, void *dest, int flags);
JANET_API void janet_ev_sendto_string(JanetStream *stream, JanetString str, void *dest, int flags);
JANET_NO_RETURN JANET_API void janet_ev_send_buffer(JanetStream *stream, JanetBuffer *buf, int flags);
JANET_NO_RETURN JANET_API void janet_ev_send_string(JanetStream *stream, JanetString str, int flags);
JANET_NO_RETURN JANET_API void janet_ev_sendto_buffer(JanetStream *stream, JanetBuffer *buf, void *dest, int flags);
JANET_NO_RETURN JANET_API void janet_ev_sendto_string(JanetStream *stream, JanetString str, void *dest, int flags);
#endif
#endif