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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@15115 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

This commit is contained in:
Giovanni Di Sirio 2021-11-19 20:16:06 +00:00
parent 656692ac4d
commit 1a103a9a5e
3 changed files with 140 additions and 3 deletions
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45
os/vfs/include/vfssystem.h
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@ -21,7 +21,7 @@
* @file vfs/include/vfssystem.h
* @brief VFS system header file.
*
* @addtogroup VFS_NODES
* @addtogroup VFS_SYSTEM
* @{
*/
@ -44,6 +44,14 @@
/* Module data structures and types. */
/*===========================================================================*/
/**
* @brief Type of a VFS error code.
*/
typedef enum {
VFS_RET_SUCCESS = 0, /**< VFS_RET_SUCCESS */
VFS_RET_NO_RESOURCE = -1/**< VFS_RET_NO_RESOURCE */
} vfserr_t;
/**
* @brief @p vfs_system_node_t specific methods.
*/
@ -78,24 +86,57 @@ typedef struct vfs_system_node {
* @brief Type of a structure representing the VFS system.
*/
typedef struct vfs_system {
#if (CH_CFG_USE_MUTEXES == TRUE) || defined(__DOXYGEN__)
/**
* @brief VFS access mutex.
*/
mutex_t mtx;
#else
/**
* @brief VFS access fallback semaphore.
*/
semaphore_t sem;
#endif
/**
* @brief Absolute root node.
*/
vfs_node_t *root_node;
/**
* @brief Next registration slot.
*/
vfs_driver_t **next_driver;
/**
* @brief Registration slots.
*/
vfs_driver_t *drivers[VFS_CFG_MAX_DRIVERS];
} vfs_system_t;
/*===========================================================================*/
/* Module macros. */
/*===========================================================================*/
/*
* Defaults on the best synchronization mechanism available.
*/
#if (CH_CFG_USE_MUTEXES == TRUE) || defined(__DOXYGEN__)
#define VFS_LOCK() chMtxLock(&vfs.mtx)
#define VFS_UNLOCK() chMtxUnlock(&vfs.mtx)
#else
#define VFS_LOCK() (void) chSemWait(&vfs.sem)
#define VFS_UNLOCK() chSemSignal(&vfs.sem)
#endif
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
extern vfs_system_t vfs;
#ifdef __cplusplus
extern "C" {
#endif
void vfsInit(void);
vfserr_t vfsRegisterDriver(vfs_driver_t *vdp);
#ifdef __cplusplus
}
#endif

96
os/vfs/src/vfssystem.c Normal file
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@ -0,0 +1,96 @@
/*
ChibiOS - Copyright (C) 2006,2007,2008,2009,2010,2011,2012,2013,2014,
2015,2016,2017,2018,2019,2020,2021 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation version 3 of the License.
ChibiOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file vfs/src/chsystem.c
* @brief VFS system code.
*
* @addtogroup VFS_SYSTEM
* @{
*/
#include "vfs.h"
/*===========================================================================*/
/* Module exported variables. */
/*===========================================================================*/
/**
* @brief Global VFS state.
*/
vfs_system_t vfs;
/*===========================================================================*/
/* Module local types. */
/*===========================================================================*/
/*===========================================================================*/
/* Module local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Module local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Module exported functions. */
/*===========================================================================*/
/**
* @brief VFS initialization.
*
* @special
*/
void vfsInit(void) {
vfs.next_driver = &vfs.drivers[0];
#if (CH_CFG_USE_MUTEXES == TRUE) || defined(__DOXYGEN__)
chMtxObjectInit(&vfs.mtx);
#else
chSemObjectInit(&vfs.sem, (cnt_t)1);
#endif
}
/**
* @brief Registers a file system driver on VFS.
*
* @param[in] vdp pointer to a @p vfs_driver_t structure
* @return The operation result.
*/
vfserr_t vfsRegisterDriver(vfs_driver_t *vdp) {
vfserr_t err;
VFS_LOCK();
if (vfs.next_driver >= &vfs.drivers[VFS_CFG_MAX_DRIVERS]) {
err = VFS_RET_NO_RESOURCE;
}
else {
*vfs.next_driver++ = vdp;
err = VFS_RET_SUCCESS;
}
VFS_UNLOCK();
return err;
}
/** @} */

2
os/vfs/vfs.mk
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@ -1,5 +1,5 @@
# List of all the ChibiOS/VFS files.
VFSSRC := #$(CHIBIOS)/os/vfs/src/vfs.c
VFSSRC := $(CHIBIOS)/os/vfs/src/vfssystem.c
# Required include directories
VFSINC := $(CHIBIOS)/os/vfs/include