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[Ada] Synchronization of run time support for controlled objects

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Hristian Kirtchev <kirtchev at adacore dot com>
Date: Mon, 24 Oct 2011 05:19:29 -0400
Subject: [Ada] Synchronization of run time support for controlled objects

This patch reimplements the synchronization of the mechanism which handles the
allocation, deallocation and finalization of heap-allocated controlled objects.

Tested on x86_64-pc-linux-gnu, committed on trunk

2011-10-24  Hristian Kirtchev  <kirtchev@adacore.com>

	* s-finmas.adb (Attach): Synchronize and call the unprotected version.
	(Attach_Unprotected): New routine.
	(Delete_Finalize_Address): Removed.
	(Delete_Finalize_Address_Unprotected): New routine.
	(Detach): Synchronize and call the unprotected version.
	(Detach_Unprotected): Remove locking.
	(Finalize): Add various comment on synchronization. Lock the critical
	region and call the unprotected versions of routines.
	(Finalize_Address): Removed.
	(Finalize_Address_Unprotected): New routine.
	(Set_Finalize_Address): Synchronize and call
	the unprotected version.
	(Set_Finalize_Address_Unprotected): New routine.
	(Set_Heterogeneous_Finalize_Address): Removed.
	(Set_Heterogeneous_Finalize_Address_Unprotected): New routine.
	(Set_Is_Heterogeneous): Add comment on synchronization and
	locking.
	* s-finmas.ads: Flag Finalization_Started is no longer atomic
	because synchronization uses task locking / unlocking.
	(Attach): Add comment on usage.
	(Attach_Unprotected): New routine.
	(Delete_Finalize_Address): Renamed to
	Delete_Finalize_Address_Unprotected.
	(Detach): Add comment on usage.
	(Detach_Unprotected): New routine.
	(Finalize_Address): Renamed to Finalize_Address_Unprotected.
	(Set_Finalize_Address): Add comment on usage.
	(Set_Finalize_Address_Unprotected): New routine.
	(Set_Heterogeneous_Finalize_Address): Renamed to
	Set_Heterogeneous_Finalize_Address_Unprotected.
	* s-stposu.adb (Allocate_Any_Controlled): Add local variable
	Allocation_Locked. Add various comments on synchronization. Lock
	the critical region and call the unprotected version of
	routines.
	(Deallocate_Any_Controlled): Add various comments on
	synchronization. Lock the critical region and call the unprotected
	version of routines.

Attachment: difs
Description: Text document

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