1 files changed, 118 insertions, 0 deletions
diff --git a/schedsim/rtems/sched_cpu/rtems/score/cpusmplock.h b/schedsim/rtems/sched_cpu/rtems/score/cpusmplock.h
new file mode 100644
index 0000000..41e68af
--- /dev/null
+++ b/schedsim/rtems/sched_cpu/rtems/score/cpusmplock.h
@@ -0,0 +1,118 @@
+/**
+ * @file
+ *
+ * @ingroup ScoreSMPLockCPU
+ *
+ * @brief CPU SMP Lock Implementation
+ */
+
+/*
+ * Copyright (c) 2013 embedded brains GmbH
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_NO_CPU_SMPLOCK_H
+#define _RTEMS_SCORE_NO_CPU_SMPLOCK_H
+
+#include <rtems/score/cpu.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup ScoreSMPLockCPU CPU SMP Locks
+ *
+ * @ingroup ScoreSMPLock
+ *
+ * This example will implement a ticket lock.
+ *
+ * @{
+ */
+
+/**
+ * @brief CPU SMP lock control.
+ */
+typedef struct {
+  unsigned int next_ticket;
+  unsigned int now_serving;
+} CPU_SMP_lock_Control;
+
+/**
+ * @brief CPU SMP lock control initializer for static initialization.
+ */
+#define CPU_SMP_LOCK_INITIALIZER { 0, 0 }
+
+/**
+ * @brief Initializes a CPU SMP lock control.
+ *
+ * @param[out] lock The CPU SMP lock control.
+ */
+static inline void _CPU_SMP_lock_Initialize( CPU_SMP_lock_Control *lock )
+{
+  lock->next_ticket = 0;
+  lock->now_serving = 0;
+}
+
+/**
+ * @brief Acquires a CPU SMP lock.
+ *
+ * @param[in,out] lock The CPU SMP lock control.
+ */
+static inline void _CPU_SMP_lock_Acquire( CPU_SMP_lock_Control *lock )
+{
+#if 0
+  unsigned int my_ticket = _Atomic_Fetch_and_increment( &lock->next_ticket );
+
+  while ( _Atomic_Load_and_acquire( &lock->now_serving ) != my_ticket ) {
+    _Wait_some_time();
+  }
+#endif
+}
+
+/**
+ * @brief Releases a CPU SMP lock.
+ *
+ * @param[in,out] lock The CPU SMP lock control.
+ */
+static inline void _CPU_SMP_lock_Release( CPU_SMP_lock_Control *lock )
+{
+#if 0
+  _Atomic_Store_and_release( &lock->now_serving, lock->now_serving + 1 );
+#endif
+}
+
+/**
+ * @brief Disables interrupts and acquires the CPU SMP lock.
+ *
+ * @param[in,out] lock The CPU SMP lock control.
+ * @param[out] isr_cookie The ISR cookie.
+ */
+#define _CPU_SMP_lock_ISR_disable_and_acquire( lock, isr_cookie ) \
+  do { \
+    _CPU_ISR_Disable( isr_cookie ); \
+    _CPU_SMP_lock_Acquire( lock ); \
+  } while (0)
+
+/**
+ * @brief Releases the CPU SMP lock and enables interrupts.
+ *
+ * @param[in,out] lock The CPU SMP lock control.
+ * @param[in] isr_cookie The ISR cookie.
+ */
+#define _CPU_SMP_lock_Release_and_ISR_enable( lock, isr_cookie ) \
+  do { \
+    _CPU_SMP_lock_Release( lock ); \
+    _CPU_ISR_Enable( isr_cookie ); \
+  } while (0)
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_SCORE_NO_CPU_SMPLOCK_H */