mirror of
https://github.com/ByteWelder/Tactility.git
synced 2026-08-18 16:05:05 +00:00
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
// SPDX-License-Identifier: Apache-2.0
|
|
#pragma once
|
|
|
|
#include <tactility/freertos/freertos.h>
|
|
|
|
#include <stdbool.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @brief Set of lock/try_lock/unlock callbacks backing a filesystem mount's mutex.
|
|
* Any field left null is treated as a no-op by file_mutex_lock/try_lock/unlock.
|
|
*/
|
|
struct FileMutex {
|
|
void (*lock)();
|
|
bool (*try_lock)(TickType_t timeout);
|
|
void (*unlock)();
|
|
};
|
|
|
|
/**
|
|
* @brief Registers a mutex for a mount path (e.g. "/sdcard") and its descendants.
|
|
* @param[in] mutex callbacks to associate with the path; a copy is stored
|
|
* @param[in] path mount path this mutex serializes access to
|
|
* @note No-op if a mutex is already registered for this exact path.
|
|
*/
|
|
void file_mutex_register(const struct FileMutex* mutex, const char* path);
|
|
|
|
/**
|
|
* @brief Looks up the mutex registered for path or one of its ancestor mount paths.
|
|
* @param[out] mutex receives the matching mutex, or an all-null (no-op) mutex if none matches
|
|
* @param[in] path file or directory path to look up
|
|
*/
|
|
void file_mutex_get(struct FileMutex* mutex, const char* path);
|
|
|
|
/** @brief Locks mutex. No-op if mutex->lock is null. */
|
|
void file_mutex_lock(struct FileMutex* mutex);
|
|
|
|
/**
|
|
* @brief Attempts to lock mutex within timeout.
|
|
* @return true if locked (or mutex->try_lock is null), false on timeout
|
|
*/
|
|
bool file_mutex_try_lock(struct FileMutex* mutex, TickType_t timeout);
|
|
|
|
/** @brief Unlocks mutex. No-op if mutex->unlock is null. */
|
|
void file_mutex_unlock(struct FileMutex* mutex);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|