Fix nasa#104, Remove OS_Tick2Micros and internalize OS_Milli2Ticks

- Removed OS_Tick2Micros implementation, tests, stubs, references
- Moved prototype from API to internal for OS_Milli2Ticks
- Updated OS_Milli2Ticks to return status
- Added check for rollover in OS_Milli2Ticks
- OS_Milli2Ticks now sets and limits ticks as int
- Updated all internal use of OS_Milli2Ticks to check for error
  and returns immediately on error (won't wait maximum amount)
- Coverage tests updated to check for new error cases
- OS_Milli2Ticks stub updated (default implementation)

src/os/inc/osapi-os-core.h

@@ -1222,38 +1222,10 @@ int32 OS_MutSemGetIdByName      (osal_id_t *sem_id, const char *sem_name);
 int32 OS_MutSemGetInfo          (osal_id_t sem_id, OS_mut_sem_prop_t *mut_prop);
 /**@}*/
 
-/** @defgroup OSAPITime OSAL Time/Tick APIs
+/** @defgroup OSAPITime OSAL Time APIs
  * @{
  */
 
-/*-------------------------------------------------------------------------------------*/
-/**
- * @brief Convert time units from milliseconds to system ticks
- *
- * This function accepts a time interval in milliseconds and
- * returns the tick equivalent.  If the result is not an exact
- * number of system ticks, the result will be rounded up to
- * the nearest tick.
- *
- * @param[in]   milli_seconds the number of milliseconds
- *
- * @return The number of ticks
- */
-int32 OS_Milli2Ticks           (uint32 milli_seconds);
-
-/*-------------------------------------------------------------------------------------*/
-/**
- * @brief Get the system tick size, in microseconds
- *
- * This function returns the duration of a system tick in micro seconds
- *
- * @note care is taken to ensure this does not return "0" since it is often used
- *  as the divisor in mathematical operations
- *
- * @return Duration of a system tick in microseconds
- */
-int32 OS_Tick2Micros           (void);
-
 /*-------------------------------------------------------------------------------------*/
 /**
  * @brief Get the local time

src/os/posix/src/os-impl-timebase.c

@@ -275,7 +275,6 @@ int32 OS_Posix_TimeBaseAPI_Impl_Init(void)
 
        /*
         * Pre-calculate the clock tick to microsecond conversion factor.
-        * This is used by OS_Tick2Micros(), OS_Milli2Ticks(), etc.
         */
        OS_SharedGlobalVars.TicksPerSecond = sysconf(_SC_CLK_TCK);
        if (OS_SharedGlobalVars.TicksPerSecond <= 0)

src/os/rtems/src/os-impl-binsem.c

@@ -244,9 +244,12 @@ int32 OS_BinSemTake_Impl (uint32 sem_id)
 int32 OS_BinSemTimedWait_Impl (uint32 sem_id, uint32 msecs)
 {
     rtems_status_code status;
-    uint32            TimeInTicks;
+    int               TimeInTicks;
 
-    TimeInTicks = OS_Milli2Ticks(msecs);
+    if (OS_Milli2Ticks(msecs, &TimInTicks) != OS_SUCCESS)
+    {
+        return OS_ERROR;
+    }
 
     status  = 	rtems_semaphore_obtain(OS_impl_bin_sem_table[sem_id].id, RTEMS_WAIT, TimeInTicks) ;
 

src/os/rtems/src/os-impl-timebase.c

@@ -231,7 +231,7 @@ int32  OS_Rtems_TimeBaseAPI_Impl_Init ( void )
 
 
    /*
-    * Finally compute the Microseconds per tick that is used for OS_Tick2Micros() call
+    * Finally compute the Microseconds per tick
     * This must further round again to the nearest microsecond, so it is undesirable to use
     * this for time computations if the result is not exact.
     */

src/os/shared/inc/os-shared-timebase.h

@@ -134,6 +134,12 @@ int32 OS_TimeBaseGetInfo_Impl       (uint32 timer_id, OS_timebase_prop_t *timer_
  ------------------------------------------------------------------*/
 void  OS_TimeBase_CallbackThread    (osal_id_t timebase_id);
 
+/*----------------------------------------------------------------
+   Function: OS_Milli2Ticks
+
+    Purpose: Convert milliseconds to ticks
+ ------------------------------------------------------------------*/
+int32 OS_Milli2Ticks(uint32 milli_seconds, int *ticks);
 
 #endif  /* INCLUDE_OS_SHARED_TIMEBASE_H_ */
 

src/os/shared/src/osapi-timebase.c

@@ -545,49 +545,32 @@ void OS_TimeBase_CallbackThread(osal_id_t timebase_id)
     }
 } /* end OS_TimeBase_CallbackThread */
 
-/****************************************************************************************
-                  Other Time-Related API Implementation
- ***************************************************************************************/
-
-/*
- * This is the OSAL-defined interface to the OS Timer tick -
- * Not sure what it is really useful for since none of the user API timer calls deal with
- * OS ticks directly.
- */
-
-
-/*----------------------------------------------------------------
- *
- * Function: OS_Tick2Micros
- *
- *  Purpose: Implemented per public OSAL API
- *           See description in API and header file for detail
- *
- *-----------------------------------------------------------------*/
-int32 OS_Tick2Micros (void)
-{
-   return (OS_SharedGlobalVars.MicroSecPerTick);
-} /* end OS_Tick2Micros */
-
-
 /*----------------------------------------------------------------
  *
  * Function: OS_Milli2Ticks
  *
- *  Purpose: Implemented per public OSAL API
- *           See description in API and header file for detail
+ *  Purpose: Internal helper to convert milliseconds to ticks
+ *
+ *  Returns: OS_SUCCESS on success, OS_ERROR on failure (rollover)
  *
  *-----------------------------------------------------------------*/
-int32 OS_Milli2Ticks(uint32 milli_seconds)
+int32 OS_Milli2Ticks(uint32 milli_seconds, int *ticks)
 {
-    unsigned long num_of_ticks;
-
-    num_of_ticks = (unsigned long)milli_seconds;
-    num_of_ticks *= OS_SharedGlobalVars.TicksPerSecond;
-    num_of_ticks = (num_of_ticks + 999) / 1000;
-
-    return((uint32)num_of_ticks);
-} /* end OS_Milli2Ticks */
+    uint64 num_of_ticks;
+    int32  return_code = OS_SUCCESS;
 
+    num_of_ticks = (((uint64)milli_seconds * OS_SharedGlobalVars.TicksPerSecond) + 999) / 1000;
 
+    /* Check against maximum int32 (limit from some OS's) */
+    if (num_of_ticks <= INT_MAX)
+    {
+        *ticks = (int)num_of_ticks;
+    }
+    else
+    {
+        return_code = OS_ERROR;
+        *ticks = 0;
+    }
 
+    return return_code;
+} /* end OS_Milli2Ticks */

src/os/vxworks/src/os-impl-binsem.c

@@ -32,6 +32,7 @@
 
 #include "os-impl-binsem.h"
 #include "os-shared-binsem.h"
+#include "os-shared-timebase.h"
 
 /****************************************************************************************
                                      DEFINES
@@ -175,7 +176,17 @@ int32 OS_BinSemTake_Impl (uint32 sem_id)
  *-----------------------------------------------------------------*/
 int32 OS_BinSemTimedWait_Impl (uint32 sem_id, uint32 msecs)
 {
-    return OS_VxWorks_GenericSemTake(OS_impl_bin_sem_table[sem_id].vxid, OS_Milli2Ticks(msecs));
+    int   ticks;
+    int32 status;
+
+    status = OS_Milli2Ticks(msecs, &ticks);
+
+    if (status == OS_SUCCESS)
+    {
+        status = OS_VxWorks_GenericSemTake(OS_impl_bin_sem_table[sem_id].vxid, ticks);
+    }
+
+    return status;
 } /* end OS_BinSemTimedWait_Impl */
 
 

src/os/vxworks/src/os-impl-countsem.c

@@ -31,6 +31,7 @@
 #include "os-vxworks.h"
 #include "os-impl-countsem.h"
 #include "os-shared-countsem.h"
+#include "os-shared-timebase.h"
 
 /****************************************************************************************
                                      DEFINES
@@ -153,8 +154,17 @@ int32 OS_CountSemTake_Impl (uint32 sem_id)
  *-----------------------------------------------------------------*/
 int32 OS_CountSemTimedWait_Impl (uint32 sem_id, uint32 msecs)
 {
-    return OS_VxWorks_GenericSemTake(OS_impl_count_sem_table[sem_id].vxid,
-            OS_Milli2Ticks(msecs));
+    int ticks;
+    int32 status;
+
+    status = OS_Milli2Ticks(msecs, &ticks);
+
+    if (status == OS_SUCCESS)
+    {
+        status = OS_VxWorks_GenericSemTake(OS_impl_count_sem_table[sem_id].vxid, ticks);
+    }
+
+    return status;
 } /* end OS_CountSemTimedWait_Impl */
 
 

src/os/vxworks/src/os-impl-queues.c

@@ -31,6 +31,7 @@
 #include "os-vxworks.h"
 #include "os-impl-queues.h"
 #include "os-shared-queue.h"
+#include "os-shared-timebase.h"
 
 
 /****************************************************************************************
@@ -137,8 +138,11 @@ int32 OS_QueueGet_Impl (uint32 queue_id, void *data, uint32 size, uint32 *size_c
     }
     else
     {
-        /* msecs rounded to the closest system tick count */
-        ticks = OS_Milli2Ticks(timeout);
+        /* msecs rounded to the closest system tick count if possible */
+        if (OS_Milli2Ticks(timeout, &ticks) != OS_SUCCESS)
+        {
+            return OS_ERROR;
+        }
     }
 
     status = msgQReceive(OS_impl_queue_table[queue_id].vxid, data, size, ticks);

src/os/vxworks/src/os-impl-tasks.c

@@ -33,6 +33,7 @@
 
 #include "os-shared-task.h"
 #include "os-shared-idmap.h"
+#include "os-shared-timebase.h"
 
 #include <errnoLib.h>
 #include <taskLib.h>
@@ -323,7 +324,11 @@ int32 OS_TaskDelay_Impl (uint32 milli_second)
     /* msecs rounded to the closest system tick count */
     int sys_ticks;
 
-    sys_ticks = OS_Milli2Ticks(milli_second);
+    /* Convert to ticks if possible */
+    if (OS_Milli2Ticks(milli_second, &sys_ticks) != OS_SUCCESS)
+    {
+        return OS_ERROR;
+    }
 
     /* if successful, the execution of task will pend here until delay finishes */
     if(taskDelay(sys_ticks) != OK)

src/os/vxworks/src/os-impl-timebase.c

@@ -317,7 +317,7 @@ int32  OS_VxWorks_TimeBaseAPI_Impl_Init ( void )
 
 
     /*
-     * Finally compute the Microseconds per tick that is used for OS_Tick2Micros() call
+     * Finally compute the Microseconds per tick
      * This must further round again to the nearest microsecond, so it is undesirable to use
      * this for time computations if the result is not exact.
      */

src/unit-test-coverage/shared/src/coveragetest-timebase.c

@@ -32,6 +32,7 @@
 #include "os-shared-common.h"
 
 #include <OCS_string.h>
+#include <limits.h>
 
 static uint32 TimerSyncCount = 0;
 static uint32 TimerSyncRetVal = 0;
@@ -293,28 +294,36 @@ void Test_OS_TimeBase_CallbackThread(void)
     OS_TimeBase_CallbackThread(UT_OBJID_2);
 }
 
-void Test_OS_Tick2Micros(void)
-{
-    /*
-     * Test Case For:
-     * int32 OS_Tick2Micros (void)
-     */
-    OS_SharedGlobalVars.MicroSecPerTick = 5555;
-    int32 actual = OS_Tick2Micros();
-
-    UtAssert_True(actual == 5555, "OS_Tick2Micros() (%ld) == 5555", (long)actual);
-}
-
 void Test_OS_Milli2Ticks(void)
 {
     /*
      * Test Case For:
      * int32 OS_Milli2Ticks(uint32 milli_seconds)
      */
-    OS_SharedGlobalVars.TicksPerSecond = 500;
-    int32 actual = OS_Milli2Ticks(5678);
+    uint32 msec;
+    int    ticks;
+    int    expected;
 
-    UtAssert_True(actual == 2839, "OS_Milli2Ticks() (%ld) == 2839", (long)actual);
+    msec = 5678;
+    OS_SharedGlobalVars.TicksPerSecond = 500;
+    UtAssert_INT32_EQ(OS_Milli2Ticks(msec, &ticks), OS_SUCCESS);
+    UtAssert_INT32_EQ(ticks, 2839);
+
+    /* Bigger than uint32 but valid case */
+    msec = UINT_MAX - 1;
+    expected = (((uint64)msec * OS_SharedGlobalVars.TicksPerSecond) + 999) / 1000;
+    UtAssert_INT32_EQ(OS_Milli2Ticks(msec, &ticks), OS_SUCCESS);
+    UtAssert_INT32_EQ(ticks, expected);
+
+    /* int rollover case */
+    msec = UINT_MAX;
+    UtAssert_INT32_EQ(OS_Milli2Ticks(msec, &ticks), OS_ERROR);
+    UtAssert_INT32_EQ(ticks, 0);
+
+    /* Max value rollover case */
+    OS_SharedGlobalVars.TicksPerSecond = INT_MAX;
+    UtAssert_INT32_EQ(OS_Milli2Ticks(msec, &ticks), OS_ERROR);
+    UtAssert_INT32_EQ(ticks, 0);
 }
 
 
@@ -354,7 +363,6 @@ void UtTest_Setup(void)
     ADD_TEST(OS_TimeBaseGetInfo);
     ADD_TEST(OS_TimeBaseGetFreeRun);
     ADD_TEST(OS_TimeBase_CallbackThread);
-    ADD_TEST(OS_Tick2Micros);
     ADD_TEST(OS_Milli2Ticks);
 }
 

src/unit-test-coverage/vxworks/src/coveragetest-binsem.c

@@ -31,6 +31,7 @@
 
 #include "os-shared-binsem.h"
 #include "os-shared-idmap.h"
+#include "os-shared-timebase.h"
 
 #include <OCS_errno.h>
 #include <OCS_objLib.h>
@@ -108,6 +109,9 @@ void Test_OS_BinSemTimedWait_Impl(void)
 
     UT_SetForceFail(UT_StubKey_GenericSemTake, OS_SEM_FAILURE);
     OSAPI_TEST_FUNCTION_RC(OS_BinSemTimedWait_Impl(0,100), OS_SEM_FAILURE);
+
+    UT_SetForceFail(UT_KEY(OS_Milli2Ticks), OS_ERROR);
+    OSAPI_TEST_FUNCTION_RC(OS_BinSemTimedWait_Impl(0,100), OS_ERROR);
 }
 
 void Test_OS_BinSemGetInfo_Impl(void)

src/unit-test-coverage/vxworks/src/coveragetest-countsem.c

@@ -29,6 +29,7 @@
 #include "ut-adaptor-countsem.h"
 
 #include "os-shared-countsem.h"
+#include "os-shared-timebase.h"
 
 void Test_OS_VxWorks_CountSemAPI_Impl_Init(void)
 {
@@ -85,6 +86,9 @@ void Test_OS_CountSemTimedWait_Impl(void)
      * int32 OS_CountSemTimedWait_Impl ( uint32 sem_id, uint32 msecs )
      */
     OSAPI_TEST_FUNCTION_RC(OS_CountSemTimedWait_Impl(0, 100), OS_SUCCESS);
+
+    UT_SetForceFail(UT_KEY(OS_Milli2Ticks), OS_ERROR);
+    OSAPI_TEST_FUNCTION_RC(OS_CountSemTimedWait_Impl(0,100), OS_ERROR);
 }
 
 void Test_OS_CountSemGetInfo_Impl(void)

src/unit-test-coverage/vxworks/src/coveragetest-queues.c

@@ -27,6 +27,7 @@
 #include "os-vxworks-coveragetest.h"
 #include "ut-adaptor-queues.h"
 #include "os-shared-queue.h"
+#include "os-shared-timebase.h"
 
 #include <OCS_msgQLib.h>
 #include <OCS_errno.h>
@@ -77,6 +78,9 @@ void Test_OS_QueueGet_Impl(void)
     OSAPI_TEST_FUNCTION_RC(OS_QueueGet_Impl(0, &Data, sizeof(Data), &ActSz, OS_CHECK), OS_SUCCESS);
     OSAPI_TEST_FUNCTION_RC(OS_QueueGet_Impl(0, &Data, sizeof(Data), &ActSz, 100), OS_SUCCESS);
 
+    UT_SetForceFail(UT_KEY(OS_Milli2Ticks), OS_ERROR);
+    OSAPI_TEST_FUNCTION_RC(OS_QueueGet_Impl(0, &Data, sizeof(Data), &ActSz, 100), OS_ERROR);
+
     UT_SetForceFail(UT_KEY(OCS_msgQReceive), OCS_ERROR);
     OCS_errno = OCS_S_objLib_OBJ_TIMEOUT;
     OSAPI_TEST_FUNCTION_RC(OS_QueueGet_Impl(0, &Data, sizeof(Data), &ActSz, OS_CHECK), OS_QUEUE_TIMEOUT);