Initial commit

1 files changed, 203 insertions, 0 deletions

diff --git a/common/src/txe_event_flags_create.c b/common/src/txe_event_flags_create.c
new file mode 100644
index 00000000..ed2038ee
--- /dev/null
+++ b/common/src/txe_event_flags_create.c
@@ -0,0 +1,203 @@
+/**************************************************************************/
+/*                                                                        */
+/*       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_initialize.h"
+#include "tx_thread.h"
+#include "tx_timer.h"
+#include "tx_event_flags.h"
+
+
+/**************************************************************************/
+/*                                                                        */
+/*  FUNCTION                                               RELEASE        */
+/*                                                                        */
+/*    _txe_event_flags_create                             PORTABLE C      */
+/*                                                           6.0          */
+/*  AUTHOR                                                                */
+/*                                                                        */
+/*    William E. Lamie, Microsoft Corporation                             */
+/*                                                                        */
+/*  DESCRIPTION                                                           */
+/*                                                                        */
+/*    This function checks for errors in the event flag creation function */
+/*    call.                                                               */
+/*                                                                        */
+/*  INPUT                                                                 */
+/*                                                                        */
+/*    group_ptr                         Pointer to event flags group      */
+/*                                        control block                   */
+/*    name_ptr                          Pointer to event flags name       */
+/*    event_control_block_size          Size of event flags control block */
+/*                                                                        */
+/*  OUTPUT                                                                */
+/*                                                                        */
+/*    TX_GROUP_ERROR                    Invalid event flag group pointer  */
+/*    TX_CALLER_ERROR                   Invalid calling function          */
+/*    status                            Actual completion status          */
+/*                                                                        */
+/*  CALLS                                                                 */
+/*                                                                        */
+/*    _tx_event_flags_create            Actual create function            */
+/*    _tx_thread_system_preempt_check   Check for preemption              */
+/*                                                                        */
+/*  CALLED BY                                                             */
+/*                                                                        */
+/*    Application Code                                                    */
+/*                                                                        */
+/*  RELEASE HISTORY                                                       */
+/*                                                                        */
+/*    DATE              NAME                      DESCRIPTION             */
+/*                                                                        */
+/*  05-19-2020     William E. Lamie         Initial Version 6.0           */
+/*                                                                        */
+/**************************************************************************/
+UINT  _txe_event_flags_create(TX_EVENT_FLAGS_GROUP *group_ptr, CHAR *name_ptr, UINT event_control_block_size)
+{
+
+TX_INTERRUPT_SAVE_AREA
+
+UINT                        status;
+ULONG                       i;
+TX_EVENT_FLAGS_GROUP        *next_group;
+#ifndef TX_TIMER_PROCESS_IN_ISR
+TX_THREAD                   *thread_ptr;
+#endif
+
+
+    /* Default status to success.  */
+    status =  TX_SUCCESS;
+
+    /* Check for an invalid event flags group pointer.  */
+    if (group_ptr == TX_NULL)
+    {
+
+        /* Event flags group pointer is invalid, return appropriate error code.  */
+        status =  TX_GROUP_ERROR;
+    }
+
+    /* Now check for proper control block size.  */
+    else if (event_control_block_size != (sizeof(TX_EVENT_FLAGS_GROUP)))
+    {
+
+        /* Event flags group pointer is invalid, return appropriate error code.  */
+        status =  TX_GROUP_ERROR;
+    }
+    else
+    {
+
+        /* Disable interrupts.  */
+        TX_DISABLE
+
+        /* Increment the preempt disable flag.  */
+        _tx_thread_preempt_disable++;
+
+        /* Restore interrupts.  */
+        TX_RESTORE
+
+        /* Next see if it is already in the created list.  */
+        next_group =   _tx_event_flags_created_ptr;
+        for (i = ((ULONG) 0); i < _tx_event_flags_created_count; i++)
+        {
+
+            /* Determine if this group matches the event flags group in the list.  */
+            if (group_ptr == next_group)
+            {
+        
+                break;
+            }
+            else
+            {
+        
+                /* Move to the next group.  */
+                next_group =  next_group -> tx_event_flags_group_created_next;
+            }
+        }
+
+        /* Disable interrupts.  */
+        TX_DISABLE
+
+        /* Decrement the preempt disable flag.  */
+        _tx_thread_preempt_disable--;
+    
+        /* Restore interrupts.  */
+        TX_RESTORE
+
+        /* Check for preemption.  */
+        _tx_thread_system_preempt_check();
+
+        /* At this point, check to see if there is a duplicate event flag group.  */
+        if (group_ptr == next_group)
+        {
+
+            /* Group is already created, return appropriate error code.  */
+            status =  TX_GROUP_ERROR;
+        }
+        else
+        {
+
+#ifndef TX_TIMER_PROCESS_IN_ISR
+
+            /* Pickup thread pointer.  */
+            TX_THREAD_GET_CURRENT(thread_ptr)
+
+            /* Check for invalid caller of this function.  First check for a calling thread.  */
+            if (thread_ptr == &_tx_timer_thread)
+            {
+
+                /* Invalid caller of this function, return appropriate error code.  */
+                status =  TX_CALLER_ERROR;
+            }
+#endif
+
+            /* Check for interrupt call.  */
+            if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
+            {
+    
+                /* Now, make sure the call is from an interrupt and not initialization.  */
+                if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
+                {
+        
+                    /* Invalid caller of this function, return appropriate error code.  */
+                    status =  TX_CALLER_ERROR;
+                }
+            }
+        }
+    }
+
+    /* Determine if everything is okay.  */
+    if (status == TX_SUCCESS)
+    {
+
+        /* Call actual event flags create function.  */
+        status =  _tx_event_flags_create(group_ptr, name_ptr);
+    }
+
+    /* Return completion status.  */
+    return(status);
+}
+