diff options
| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-11-17 06:36:54 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-11-22 09:40:22 +0100 |
| commit | a7dcef97e93240b1947a0094b1af91e9b9324a30 (patch) | |
| tree | 41a02234f131870bcb0c7bcc025682bce45fa582 /cpukit/score/src/threadhandler.c | |
| parent | bsps: Add default getentropy() implementation (diff) | |
| download | rtems-a7dcef97e93240b1947a0094b1af91e9b9324a30.tar.bz2 | |
score: Simplify global construction
Update #3243.
Diffstat (limited to 'cpukit/score/src/threadhandler.c')
| -rw-r--r-- | cpukit/score/src/threadhandler.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/cpukit/score/src/threadhandler.c b/cpukit/score/src/threadhandler.c index 7267577baf..9201c55607 100644 --- a/cpukit/score/src/threadhandler.c +++ b/cpukit/score/src/threadhandler.c @@ -24,6 +24,50 @@ #include <rtems/score/isrlevel.h> #include <rtems/score/userextimpl.h> +/* + * Conditional magic to determine what style of C++ constructor + * initialization this target and compiler version uses. + */ +#if defined(__USE_INIT_FINI__) + #if defined(__ARM_EABI__) + #define INIT_NAME __libc_init_array + #else + #define INIT_NAME _init + #endif + + extern void INIT_NAME(void); + #define EXECUTE_GLOBAL_CONSTRUCTORS +#endif + +#if defined(__USE__MAIN__) + extern void __main(void); + #define INIT_NAME __main + #define EXECUTE_GLOBAL_CONSTRUCTORS +#endif + +Objects_Id _Thread_Global_constructor; + +static void _Thread_Global_construction( Thread_Control *executing ) +{ +#if defined(EXECUTE_GLOBAL_CONSTRUCTORS) + if ( executing->Object.id == _Thread_Global_constructor ) { + /* + * Prevent double construction in case the initialization thread is deleted + * and then recycled. There is not need for extra synchronization since + * this variable is set during the sequential system boot procedure. + */ + _Thread_Global_constructor = 0; + + /* + * _init could be a weak symbol and we SHOULD test it but it isn't + * in any configuration I know of and it generates a warning on every + * RTEMS target configuration. --joel (12 May 2007) + */ + INIT_NAME(); + } +#endif +} + void _Thread_Handler( void ) { Thread_Control *executing; @@ -80,6 +124,8 @@ void _Thread_Handler( void ) */ _User_extensions_Thread_begin( executing ); + _Thread_Global_construction( executing ); + /* * RTEMS supports multiple APIs and each API can define a different * thread/task prototype. The following code supports invoking the |