upload initial port

1 files changed, 180 insertions, 0 deletions

diff --git a/ChibiOS_20.3.2/os/nil/include/chsem.h b/ChibiOS_20.3.2/os/nil/include/chsem.h
new file mode 100644
index 0000000..7caad00
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+++ b/ChibiOS_20.3.2/os/nil/include/chsem.h
@@ -0,0 +1,180 @@
+/*

+    ChibiOS - Copyright (C) 2006..2018 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; either version 3 of the License, or

+    (at your option) any later version.

+

+    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    nil/include/chsem.h

+ * @brief   Nil RTOS semaphores header file.

+ *

+ * @addtogroup NIL_SEMAPHORES

+ * @{

+ */

+

+#ifndef CHSEM_H

+#define CHSEM_H

+

+#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)

+

+/*===========================================================================*/

+/* Module constants.                                                         */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* Module pre-compile time settings.                                         */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* Derived constants and error checks.                                       */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* Module data structures and types.                                         */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* Module macros.                                                            */

+/*===========================================================================*/

+

+/**

+ * @name    Macro Functions

+ * @{

+ */

+/**

+ * @brief   Initializes a semaphore with the specified counter value.

+ *

+ * @param[out] sp       pointer to a @p semaphore_t structure

+ * @param[in] n         initial value of the semaphore counter. Must be

+ *                      non-negative.

+ *

+ * @init

+ */

+#define chSemObjectInit(sp, n) ((sp)->cnt = (n))

+

+/**

+ * @brief   Performs a reset operation on the semaphore.

+ * @post    After invoking this function all the threads waiting on the

+ *          semaphore, if any, are released and the semaphore counter is set

+ *          to the specified, non negative, value.

+ * @note    This function implicitly sends @p MSG_RESET as message.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ * @param[in] n         the new value of the semaphore counter. The value must

+ *                      be non-negative.

+ *

+ * @api

+ */

+#define chSemReset(sp, n) chSemResetWithMessage(sp, n, MSG_RESET)

+

+/**

+ * @brief   Performs a reset operation on the semaphore.

+ * @post    After invoking this function all the threads waiting on the

+ *          semaphore, if any, are released and the semaphore counter is set

+ *          to the specified, non negative, value.

+ * @post    This function does not reschedule so a call to a rescheduling

+ *          function must be performed before unlocking the kernel. Note that

+ *          interrupt handlers always reschedule on exit so an explicit

+ *          reschedule must not be performed in ISRs.

+ * @note    This function implicitly sends @p MSG_RESET as message.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ * @param[in] n         the new value of the semaphore counter. The value must

+ *                      be non-negative.

+ *

+ * @iclass

+ */

+#define chSemResetI(sp, n) chSemResetWithMessageI(sp, n, MSG_RESET)

+

+/**

+ * @brief   Performs a wait operation on a semaphore.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ * @return              A message specifying how the invoking thread has been

+ *                      released from the semaphore.

+ * @retval CH_MSG_OK   if the thread has not stopped on the semaphore or the

+ *                      semaphore has been signaled.

+ * @retval CH_MSG_RST  if the semaphore has been reset using @p chSemReset().

+ *

+ * @api

+ */

+#define chSemWait(sp) chSemWaitTimeout(sp, TIME_INFINITE)

+

+/**

+ * @brief   Performs a wait operation on a semaphore.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ * @return              A message specifying how the invoking thread has been

+ *                      released from the semaphore.

+ * @retval CH_MSG_OK   if the thread has not stopped on the semaphore or the

+ *                      semaphore has been signaled.

+ * @retval CH_MSG_RST  if the semaphore has been reset using @p chSemReset().

+ *

+ * @sclass

+ */

+#define chSemWaitS(sp) chSemWaitTimeoutS(sp, TIME_INFINITE)

+

+/**

+ * @brief   Decreases the semaphore counter.

+ * @details This macro can be used when the counter is known to be positive.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ *

+ * @iclass

+ */

+#define chSemFastWaitI(sp) ((sp)->cnt--)

+

+/**

+ * @brief   Increases the semaphore counter.

+ * @details This macro can be used when the counter is known to be not

+ *          negative.

+ *

+ * @param[in] sp        pointer to a @p semaphore_t structure

+ *

+ * @iclass

+ */

+#define chSemFastSignalI(sp) ((sp)->cnt++)

+

+/**

+ * @brief   Returns the semaphore counter current value.

+ *

+ * @iclass

+ */

+#define chSemGetCounterI(sp) ((sp)->cnt)

+/** @} */

+

+/*===========================================================================*/

+/* External declarations.                                                    */

+/*===========================================================================*/

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+  msg_t chSemWaitTimeout(semaphore_t *sp, sysinterval_t timeout);

+  msg_t chSemWaitTimeoutS(semaphore_t *sp, sysinterval_t timeout);

+  void chSemSignal(semaphore_t *sp);

+  void chSemSignalI(semaphore_t *sp);

+  void chSemResetWithMessage(semaphore_t *sp, cnt_t n, msg_t msg);

+  void chSemResetWithMessageI(semaphore_t *sp, cnt_t n, msg_t msg);

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* CH_CFG_USE_SEMAPHORES == TRUE */

+

+#endif /* CHSEM_H */

+

+/** @} */