a-taster.adb (Current_Task_Fallback_Handler): Document why explicit protection against race conditions is not needed.

2006-02-13  Jose Ruiz  <ruiz@adacore.com>

	* a-taster.adb (Current_Task_Fallback_Handler): Document why explicit
	protection against race conditions is not needed.
	(Set_Dependents_Fallback_Handler): Add mutual exclusive access to the
	fallback handler.
	(Set_Specific_Handler): Add mutual exclusive access to the specific
	handler.
	(Specific_Handler): Add mutual exclusive access for retrieving the
	specific handler.

	* s-tarest.adb (Task_Wrapper): Add mutual exclusive access to the fall
	back handler.

	* s-taskin.ads (Common_ATCB): Remove pragma Atomic for
	Fall_Back_Handler and Specific_Handler.

	* s-tassta.adb (Task_Wrapper): Add mutual exclusive access to the task
	termination handlers.
	Set two different owerflow depending on the maximal stack size.

	* s-solita.adb (Task_Termination_Handler_T): Document why explicit
	protection against race conditions is not needed when executing the
	task termination handler.

From-SVN: r111022