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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2019-12-07 12:06:01 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2019-12-11 09:05:07 +0100 |
| commit | 4686554260a89ab1127d0583d5636df4174bc813 (patch) | |
| tree | a4abd059baddd1bd17b30d30dda15e2b7d579617 /cpukit/include/rtems/confdefs.h | |
| parent | rtems: Optimize semaphore control block (diff) | |
| download | rtems-4686554260a89ab1127d0583d5636df4174bc813.tar.bz2 | |
rtems: Simplify semaphore configuration
The MrsP semaphore implementation predates the addition of
self-contained synchronization objects. At this time, the potential
memory reduction was justified considering the more complex
configuration and additional use of the workspace. With the
availability of self-contained synchronization options, e.g. POSIX
mutexes, this is no longer justified. Memory constrained applications
should use the self-contained synchronization objects. Remove the
CONFIGURE_MAXIMUM_MRSP_SEMAPHORES configuration option. This has only an
impact on applications which use SMP and a large number of scheduler
instances.
Update #3833.
Diffstat (limited to 'cpukit/include/rtems/confdefs.h')
| -rw-r--r-- | cpukit/include/rtems/confdefs.h | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/cpukit/include/rtems/confdefs.h b/cpukit/include/rtems/confdefs.h index cbcd1f98c2..3f949b2cfa 100644 --- a/cpukit/include/rtems/confdefs.h +++ b/cpukit/include/rtems/confdefs.h @@ -2000,22 +2000,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[]; #define CONFIGURE_MAXIMUM_SEMAPHORES 0 #endif -/* - * This macro is calculated to specify the memory required for - * Classic API Semaphores using MRSP. This is only available in - * SMP configurations. - */ -#if !defined(RTEMS_SMP) || \ - !defined(CONFIGURE_MAXIMUM_MRSP_SEMAPHORES) - #define _CONFIGURE_MEMORY_FOR_MRSP_SEMAPHORES 0 -#else - #define _CONFIGURE_MEMORY_FOR_MRSP_SEMAPHORES \ - CONFIGURE_MAXIMUM_MRSP_SEMAPHORES * \ - _Configure_From_workspace( \ - RTEMS_ARRAY_SIZE(_Scheduler_Table) * sizeof(Priority_Control) \ - ) -#endif - #ifndef CONFIGURE_MAXIMUM_MESSAGE_QUEUES /** * This configuration parameter specifies the maximum number of @@ -2502,7 +2486,6 @@ struct _reent *__getreent(void) _CONFIGURE_TASKS, _CONFIGURE_TASKS) + \ _CONFIGURE_MEMORY_FOR_TASKS( \ _CONFIGURE_POSIX_THREADS, _CONFIGURE_POSIX_THREADS) + \ - _CONFIGURE_MEMORY_FOR_MRSP_SEMAPHORES + \ _CONFIGURE_MEMORY_FOR_POSIX_MESSAGE_QUEUES( \ CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES) + \ _CONFIGURE_MEMORY_FOR_POSIX_SEMAPHORES( \ @@ -2786,7 +2769,10 @@ struct _reent *__getreent(void) #endif #if CONFIGURE_MAXIMUM_SEMAPHORES > 0 - SEMAPHORE_INFORMATION_DEFINE( CONFIGURE_MAXIMUM_SEMAPHORES ); + SEMAPHORE_INFORMATION_DEFINE( + CONFIGURE_MAXIMUM_SEMAPHORES, + _CONFIGURE_SCHEDULER_COUNT + ); #endif #if _CONFIGURE_TIMERS > 0 @@ -3171,6 +3157,10 @@ struct _reent *__getreent(void) #warning "The CONFIGURE_NUMBER_OF_TERMIOS_PORTS configuration option is obsolete since RTEMS 5.1" #endif +#ifdef CONFIGURE_MAXIMUM_MRSP_SEMAPHORES + #warning "The CONFIGURE_MAXIMUM_MRSP_SEMAPHORES configuration option is obsolete since RTEMS 5.1" +#endif + #ifdef CONFIGURE_MAXIMUM_POSIX_BARRIERS #warning "The CONFIGURE_MAXIMUM_POSIX_BARRIERS configuration option is obsolete since RTEMS 5.1" #endif |