Initial commit

1 files changed, 177 insertions, 0 deletions

diff --git a/common/src/txe_event_flags_get.c b/common/src/txe_event_flags_get.c
new file mode 100644
index 00000000..3ded965f
--- /dev/null
+++ b/common/src/txe_event_flags_get.c
@@ -0,0 +1,177 @@
+/**************************************************************************/
+/*                                                                        */
+/*       Copyright (c) Microsoft Corporation. All rights reserved.        */
+/*                                                                        */
+/*       This software is licensed under the Microsoft Software License   */
+/*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
+/*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
+/*       and in the root directory of this software.                      */
+/*                                                                        */
+/**************************************************************************/
+
+
+/**************************************************************************/
+/**************************************************************************/
+/**                                                                       */
+/** ThreadX Component                                                     */
+/**                                                                       */
+/**   Event Flags                                                         */
+/**                                                                       */
+/**************************************************************************/
+/**************************************************************************/
+
+#define TX_SOURCE_CODE
+
+
+/* Include necessary system files.  */
+
+#include "tx_api.h"
+#include "tx_thread.h"
+#include "tx_timer.h"
+#include "tx_event_flags.h"
+
+
+/**************************************************************************/
+/*                                                                        */
+/*  FUNCTION                                               RELEASE        */
+/*                                                                        */
+/*    _txe_event_flags_get                                PORTABLE C      */
+/*                                                           6.0          */
+/*  AUTHOR                                                                */
+/*                                                                        */
+/*    William E. Lamie, Microsoft Corporation                             */
+/*                                                                        */
+/*  DESCRIPTION                                                           */
+/*                                                                        */
+/*    This function checks for errors in the event flags get function     */
+/*    call.                                                               */
+/*                                                                        */
+/*  INPUT                                                                 */
+/*                                                                        */
+/*    group_ptr                         Pointer to group control block    */
+/*    requested_event_flags             Event flags requested             */
+/*    get_option                        Specifies and/or and clear options*/
+/*    actual_flags_ptr                  Pointer to place the actual flags */
+/*                                        the service retrieved           */
+/*    wait_option                       Suspension option                 */
+/*                                                                        */
+/*  OUTPUT                                                                */
+/*                                                                        */
+/*    TX_GROUP_ERROR                    Invalid event flags group pointer */
+/*    TX_PTR_ERROR                      Invalid actual flags pointer      */
+/*    TX_WAIT_ERROR                     Invalid wait option               */
+/*    TX_OPTION_ERROR                   Invalid get option                */
+/*    TX_CALLER_ERROR                   Invalid caller of this function   */
+/*    status                            Actual completion status          */
+/*                                                                        */
+/*  CALLS                                                                 */
+/*                                                                        */
+/*    _tx_event_flags_get               Actual event flags get function   */
+/*                                                                        */
+/*  CALLED BY                                                             */
+/*                                                                        */
+/*    Application Code                                                    */
+/*                                                                        */
+/*  RELEASE HISTORY                                                       */
+/*                                                                        */
+/*    DATE              NAME                      DESCRIPTION             */
+/*                                                                        */
+/*  05-19-2020     William E. Lamie         Initial Version 6.0           */
+/*                                                                        */
+/**************************************************************************/
+UINT  _txe_event_flags_get(TX_EVENT_FLAGS_GROUP *group_ptr, ULONG requested_flags,
+                    UINT get_option, ULONG *actual_flags_ptr, ULONG wait_option)
+{
+
+UINT            status;
+
+#ifndef TX_TIMER_PROCESS_IN_ISR
+TX_THREAD       *current_thread;
+#endif
+
+
+    /* Default status to success.  */
+    status =  TX_SUCCESS;
+
+    /* Check for an invalid event flag group pointer.  */
+    if (group_ptr == TX_NULL)
+    {
+
+        /* Event flags group pointer is invalid, return appropriate error code.  */
+        status =  TX_GROUP_ERROR;
+    }
+    
+    /* Now check for invalid event group ID.  */
+    else if (group_ptr -> tx_event_flags_group_id != TX_EVENT_FLAGS_ID)
+    {
+
+        /* Event flags group pointer is invalid, return appropriate error code.  */
+        status =  TX_GROUP_ERROR;
+    }
+
+    /* Check for an invalid destination for actual flags.  */
+    else if (actual_flags_ptr == TX_NULL)
+    {
+
+        /* Null destination pointer, return appropriate error.  */
+        status =  TX_PTR_ERROR;
+    }
+    else
+    {
+
+        /* Check for a wait option error.  Only threads are allowed any form of 
+           suspension.  */
+        if (wait_option != TX_NO_WAIT)
+        {
+
+            /* Is the call from an ISR or Initialization?  */
+            if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
+            {
+
+                /* A non-thread is trying to suspend, return appropriate error code.  */
+                status =  TX_WAIT_ERROR;
+            }
+#ifndef TX_TIMER_PROCESS_IN_ISR
+            else
+            {
+            
+                /* Pickup thread pointer.  */
+                TX_THREAD_GET_CURRENT(current_thread)
+
+                /* Is the current thread the timer thread?  */
+                if (current_thread == &_tx_timer_thread)
+                {
+
+                    /* A non-thread is trying to suspend, return appropriate error code.  */
+                    status =  TX_WAIT_ERROR;
+                }
+            }
+#endif
+        }
+    }
+
+    /* Is everything still okay?  */
+    if (status == TX_SUCCESS)
+    {
+    
+        /* Check for invalid get option.  */
+        if (get_option > TX_AND_CLEAR)
+        {
+
+            /* Invalid get events option, return appropriate error.  */
+            status =  TX_OPTION_ERROR;
+        }
+    }
+
+    /* Determine if everything is okay.  */
+    if (status == TX_SUCCESS)
+    {
+
+        /* Call actual event flags get function.  */
+        status =  _tx_event_flags_get(group_ptr, requested_flags, get_option, actual_flags_ptr, wait_option);
+    }
+
+    /* Return completion status.  */
+    return(status);
+}
+