mirror of
https://github.com/ByteWelder/Tactility.git
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4279a8ed72
Features: - Implemented terminal app based on BreezyBox - Implemented shell based on BreezyBox - Added font-module with fixed-width fonts Improvements: - Improved application standard-output and error-output routing, including dynamically loaded applications. - Updated shared icons and Material Symbols mappings. - Other improvements & fixes
97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <app/file.h>
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#include <app/instance.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <tactility/concurrent/mutex.h>
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#include <tactility/concurrent/task_event_group.h>
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#include <tactility/error.h>
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#include <tactility/freertos/freertos.h>
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#include <tactility/freertos/task.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @warning Internal data. */
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struct AppStreamBuffer {
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uint8_t* data;
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size_t capacity;
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size_t read_pos;
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size_t write_pos;
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size_t count;
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};
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/**
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* Buffered byte-oriented communication between one producer task and one consumer task. The
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* consumer owns the AppStream object and its lifetime. See app_stream_subscribe().
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* @warning Internal data.
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*/
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struct AppStream {
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struct AppStreamBuffer buffer;
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AppInstanceId producer_id;
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TaskHandle_t producer_task;
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int producer_fd;
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struct Mutex mutex;
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struct TaskEventGroup* event_group;
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uint32_t readable_bit;
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uint32_t writable_bit;
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bool closed;
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int active_operations;
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};
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/**
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* Registers @a stream as the file-like object bound to @a producer_id's fd table at
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* @a producer_fd, claiming two bits from @a event_group for readiness. At most one subscriber
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* per fd; subscribing over an existing one closes it first.
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* @param[in,out] stream caller-owned; must stay valid until app_stream_unsubscribe() returns.
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* @param[in] buffer ring buffer storage; caller-owned, same validity as @a stream.
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* @param[in] event_group caller-owned; must outlive @a stream.
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* @retval ERROR_NOT_FOUND no instance with this id is running
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* @retval ERROR_OUT_OF_RANGE @a producer_fd is out of range
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* @retval ERROR_RESOURCE @a event_group has no free bits left to claim
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* @retval ERROR_NONE on success
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*/
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error_t app_stream_subscribe(struct AppStream* stream, void* buffer, size_t buffer_capacity, struct TaskEventGroup* event_group, AppInstanceId producer_id, int producer_fd);
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/**
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* Binds an already-subscribed @a stream at a second fd too, so writes to either fd land in the
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* same buffer in true write-time order (e.g. aliasing stderr onto a stdout stream).
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* @retval ERROR_NOT_FOUND no instance with @a stream's producer_id is running
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* @retval ERROR_OUT_OF_RANGE @a alias_fd is out of range
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*/
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error_t app_stream_bind_alias_fd(struct AppStream* stream, int alias_fd);
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/**
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* Removes @a stream's fd-table binding, waits for in-flight AppFileOps calls to finish, then
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* releases its event bits and destructs its mutex. Only after this returns is @a stream safe to
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* free or reuse.
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*/
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error_t app_stream_unsubscribe(struct AppStream* stream);
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/**
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* Blocks until @a stream becomes readable/writable (per @a wait) or @a timeout elapses.
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* @retval ERROR_NONE the condition is true
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* @retval ERROR_TIMEOUT @a timeout elapsed
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* @retval ERROR_ISR_STATUS called from an ISR
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*/
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error_t app_stream_await(struct AppStream* stream, AppFileWait wait, TickType_t timeout);
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/** Non-blocking: copies up to @a buffer_size currently-available bytes out of @a stream. */
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size_t app_stream_read(struct AppStream* stream, void* buffer, size_t buffer_size);
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/** Non-blocking: copies up to @a buffer_size bytes into @a stream. Returns 0 once closed. */
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size_t app_stream_write(struct AppStream* stream, const void* buffer, size_t buffer_size);
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/** Marks @a stream closed: readers see EOF, writers fail. Does not free @a stream's storage. */
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error_t app_stream_close(struct AppStream* stream);
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#ifdef __cplusplus
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}
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#endif
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