Initial commit

1 files changed, 146 insertions, 0 deletions

diff --git a/common/src/tx_mutex_create.c b/common/src/tx_mutex_create.c
new file mode 100644
index 00000000..3b70289d
--- /dev/null
+++ b/common/src/tx_mutex_create.c
@@ -0,0 +1,146 @@
+/**************************************************************************/
+/*                                                                        */
+/*       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                                                     */
+/**                                                                       */
+/**   Mutex                                                               */
+/**                                                                       */
+/**************************************************************************/
+/**************************************************************************/
+
+#define TX_SOURCE_CODE
+
+
+/* Include necessary system files.  */
+
+#include "tx_api.h"
+#include "tx_thread.h"
+#include "tx_trace.h"
+#include "tx_mutex.h"
+
+
+/**************************************************************************/
+/*                                                                        */
+/*  FUNCTION                                               RELEASE        */
+/*                                                                        */
+/*    _tx_mutex_create                                    PORTABLE C      */
+/*                                                           6.0          */
+/*  AUTHOR                                                                */
+/*                                                                        */
+/*    William E. Lamie, Microsoft Corporation                             */
+/*                                                                        */
+/*  DESCRIPTION                                                           */
+/*                                                                        */
+/*    This function creates a mutex with optional priority inheritance as */
+/*    specified in this call.                                             */
+/*                                                                        */
+/*  INPUT                                                                 */
+/*                                                                        */
+/*    mutex_ptr                             Pointer to mutex control block*/
+/*    name_ptr                              Pointer to mutex name         */
+/*    inherit                               Priority inheritance option   */
+/*                                                                        */
+/*  OUTPUT                                                                */
+/*                                                                        */
+/*    TX_SUCCESS                        Successful completion status      */
+/*                                                                        */
+/*  CALLS                                                                 */
+/*                                                                        */
+/*    None                                                                */
+/*                                                                        */
+/*  CALLED BY                                                             */
+/*                                                                        */
+/*    Application Code                                                    */
+/*                                                                        */
+/*  RELEASE HISTORY                                                       */
+/*                                                                        */
+/*    DATE              NAME                      DESCRIPTION             */
+/*                                                                        */
+/*  05-19-2020     William E. Lamie         Initial Version 6.0           */
+/*                                                                        */
+/**************************************************************************/
+UINT  _tx_mutex_create(TX_MUTEX *mutex_ptr, CHAR *name_ptr, UINT inherit)
+{
+
+TX_INTERRUPT_SAVE_AREA
+
+TX_MUTEX        *next_mutex;
+TX_MUTEX        *previous_mutex;
+
+
+    /* Initialize mutex control block to all zeros.  */
+    TX_MEMSET(mutex_ptr, 0, (sizeof(TX_MUTEX)));
+
+    /* Setup the basic mutex fields.  */
+    mutex_ptr -> tx_mutex_name =             name_ptr;
+    mutex_ptr -> tx_mutex_inherit =          inherit;
+    
+    /* Disable interrupts to place the mutex on the created list.  */
+    TX_DISABLE
+
+    /* Setup the mutex ID to make it valid.  */
+    mutex_ptr -> tx_mutex_id =  TX_MUTEX_ID;
+
+    /* Setup the thread mutex release function pointer.  */
+    _tx_thread_mutex_release =  &(_tx_mutex_thread_release);
+
+    /* Place the mutex on the list of created mutexes.  First,
+       check for an empty list.  */
+    if (_tx_mutex_created_count == TX_EMPTY)
+    {
+
+        /* The created mutex list is empty.  Add mutex to empty list.  */
+        _tx_mutex_created_ptr =                   mutex_ptr;
+        mutex_ptr -> tx_mutex_created_next =      mutex_ptr;
+        mutex_ptr -> tx_mutex_created_previous =  mutex_ptr;
+    }
+    else
+    {
+
+        /* This list is not NULL, add to the end of the list.  */
+        next_mutex =      _tx_mutex_created_ptr;
+        previous_mutex =  next_mutex -> tx_mutex_created_previous;
+
+        /* Place the new mutex in the list.  */
+        next_mutex -> tx_mutex_created_previous =  mutex_ptr;
+        previous_mutex -> tx_mutex_created_next =  mutex_ptr;
+
+        /* Setup this mutex's next and previous created links.  */
+        mutex_ptr -> tx_mutex_created_previous =  previous_mutex;
+        mutex_ptr -> tx_mutex_created_next =      next_mutex;
+    }
+
+    /* Increment the ownership count.  */
+    _tx_mutex_created_count++;
+    
+    /* Optional mutex create extended processing.  */
+    TX_MUTEX_CREATE_EXTENSION(mutex_ptr)
+
+    /* If trace is enabled, register this object.  */
+    TX_TRACE_OBJECT_REGISTER(TX_TRACE_OBJECT_TYPE_MUTEX, mutex_ptr, name_ptr, inherit, 0)
+
+    /* If trace is enabled, insert this event into the trace buffer.  */
+    TX_TRACE_IN_LINE_INSERT(TX_TRACE_MUTEX_CREATE, mutex_ptr, inherit, TX_POINTER_TO_ULONG_CONVERT(&next_mutex), 0, TX_TRACE_MUTEX_EVENTS)
+
+    /* Log this kernel call.  */
+    TX_EL_MUTEX_CREATE_INSERT
+
+    /* Restore interrupts.  */
+    TX_RESTORE
+
+    /* Return TX_SUCCESS.  */
+    return(TX_SUCCESS);
+}
+