changelog

eCos操作系统源码

	return the value of the scheduler lock; this for implementing SPLX
	in the network stack.

	* src/common/kapi.cxx (cyg_scheduler_read_lock): New function.

2000-06-20  Nick Garnett  <[e-mail]>

	* src/sched/mlqueue.cxx (Cyg_ThreadQueue_Implementation::enqueue):
	Rewrote code to insert threads into priority sorted queue. The
	original code could not cope with a queue all of whose members
	were lower priority than the new thread - it looped for ever. Also
	provided fast paths for common and easily detected cases such as
	adding to a single element queue and adding at the front. By
	taking these cases out early, we can also simplify the code to
	search the queue.

2000-06-16  Gary Thomas  <[e-mail]>

	* cdl/kernel.cdl: Remove exception tests for CMA230 - not supported
	by hardware.

2000-06-16  Jesper Skov  <[e-mail]>

	* src/intr/intr.cxx (chain_isr): Only call default_isr if no isrs
	in the chain reacted to the interrupt.

2000-06-15  Nick Garnett  <[e-mail]>

	* include/mutex.hxx (class Cyg_Condition_Variable): Added an
	inline function, get_queue(), to return a pointer to the
	underlying thread queue. To be used mainly for comparing with a
	thread's current queue to decide whether it is waiting for a
	condition variable.

	* include/kapi.h:
	* src/common/kapi.cxx: 
	Changed return type of cyg_semaphore_wait() to match existing
	behaviour of Cyg_Counting_Semaphore::wait().
	Changed return type of cyg_cond_wait() to match new behaviour of
	Cyg_Condition_Variable::wait().

2000-06-09  Nick Garnett  <[e-mail]>

	* include/mutex.hxx:
	* src/sync/mutex.cxx:
	Modified non-timeout condition variable wait() API to return
	cyg_bool. A true result indicates that the wait() terminated
	normally. A false result indicates that the wait() was terminated
	as a result of a release() or destroy operation. For most uses
	this distinction is irrelevant, but in some situations it is a
	useful bit of information to have.
	Also modified timeout condition variable wait to reacquire the
	mutex under all circumstances. This is the correct and consistent
	thing to do.

2000-06-08  Jesper Skov  <[e-mail]>

	* src/debug/dbg-thread-demux.c: Use generic HAL feature to allow
	ROM/RAM intercalling.

2000-06-06  Jesper Skov  <[e-mail]>

	* tests/kcache1.c (entry0): Skip invalidate tests on TX49. Too slow.

2000-05-30  Gary Thomas  <[e-mail]>

	* tests/dhrystone.c: Increase number of test loops for faster
	StrongARM platforms.

2000-05-22  Jonathan Larmour  <[e-mail]>

	* cdl/scheduler.cdl (CYGIMP_KERNEL_SCHED_SORTED_QUEUES): Disable by
	default

	* src/sched/mlqueue.cxx (enqueue): Add to end of thread queue even
	when not priority ordered

2000-05-20  Jonathan Larmour  <[e-mail]>

	* include/mqueue.hxx, include/mqueue.inl:
	Add POSIX-style message queue implementation
	
	* cdl/kernel.cdl: Add mqueue1 test
	* cdl/scheduler.cdl: Add new CYGIMP_KERNEL_SCHED_SORTED_QUEUES option

	* include/sema.hxx: Need thread.inl header, not just thread.hxx
	Make Cyg_Counting_Semaphore::peek() const since it is

	* src/sync/cnt_sem.cxx, src/sync/cnt_sem2.cxx, include/sema2.hxx:
	Make Cyg_Counting_Semaphore{2}::peek() const since it is

	* include/thread.hxx: don't want Cyg_Thread_queue::empty() to be marked
	inline in the class def, otherwise we get warnings elsewhere

	* include/mlqueue.hxx (Cyg_ThreadQueue_Implementation):
	Add set_thread_queue private method
	Add derived class Cyg_SchedulerThreadQueue_Implementation, and
	make scheduler implementation use it instead of
	Cyg_ThreadQueue_Implementation
	
	* src/mlqueue.cxx: Fix typo
	Support  CYGIMP_KERNEL_SCHED_SORTED_QUEUES, i.e. allow insertion
	into thread queue in order of thread priority, with oldest at the
	front
	(Cyg_ThreadQueue_Implementation::set_thread_queue): Add
	(Cyg_SchedulerThreadQueue_Implementation::enqueue): Add, like old
	one, except make it FIFO instead of LIFO by inserting at end of queue

2000-05-16  Jesper Skov  <[e-mail]>

	* tests/dhrystone.c: More loops on the TX49

2000-05-15  Jonathan Larmour  <[e-mail]>

	* cdl/counters.cdl (CYGVAR_KERNEL_COUNTERS_CLOCK_DSR_LATENCY): 
	Default to CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY

2000-05-04  Jonathan Larmour  <[e-mail]>

	* include/instrmnt.h: Remove all CYG_UNUSED_PARAMs as they could
	cause problems when used with volatile arguments
	* src/intr/intr.cxx: Use CYG_UNUSED_PARAM to silence warning that
	appears because of the above change.

2000-05-02  Gary Thomas  <[e-mail]>

	* tests/kintr0.c:
	* tests/intr0.cxx: Correct test for cases when VSR_MIN or
	ISR_MIN are not zero (bad assumption).

2000-05-02  Jonathan Larmour  <[e-mail]>

	* cdl/thread.cdl (CYGNUM_KERNEL_THREADS_DATA_LIBC): Don't need libc
	slot. Replace with CYGNUM_KERNEL_THREADS_DATA_ERRNO slot instead.	

2000-04-28  Nick Garnett  <[e-mail]>

	* src/sched/sched.cxx (unlock_inner):
	A significant change to the behaviour of this function.  The
	new_lock argument contains the value that the scheduler lock
	should have after this function has completed. If it is zero then
	the lock is being released and some extra work (running ASRs,
	checking for DSRs) is done before returning. If it is non-zero
	then it must equal the current value of the lock, and is used to
	indicate that we want to reacquire the scheduler lock before
	returning. This latter option only makes any sense if the current
	thread is no longer runnable, otherwise this function will do
	nothing.

	The result of this is that where we used to "blip" the scheduler
	lock to force a sleep, we now call reschedule(), which calls
	unlock_inner() with the current sched_lock value. The important
	difference is that there is not now the brief window between the
	calls where the lock is unclaimed. It also prevents ASRs being run
	at inopportune moments. In future this will also allow us to force
	threads to sleep even when they are deeply nested in the scheduler
	lock.

	* include/mutex.hxx:
	Added Cyg_Mutex::get_owner() to return pointer to owning thread.
	
	* include/sched.hxx:
	* include/sched.inl:	
	Added new_lock argument to unlock_inner(), added reschedule().
	Made set_asr_inhibit() and clear_asr_inhibit() available even when
	ASRs are disabled.

	* include/mboxt.inl:
	* src/sync/bin_sem.cxx: 
	* src/sync/cnt_sem.cxx:
	* src/sync/flag.cxx: 
	* src/sync/mutex.cxx: 
	Converted instances of "blipping" the scheduler lock into calls to
	Cyg_Scheduler::reschedule(), which is better behaved. Some calls
	to set_asr_inhibit() and clear_asr_inhibit() also added in various
	places.

2000-04-26  Jesper Skov  <[e-mail]>

	* tests/kcache1.c: Also to flush testing with unified caches.

2000-04-26  Jesper Skov  <[e-mail]>

	* tests/clockcnv.cxx: 
	* tests/dhrystone.c: 
	Renamed 850 HAL package.
	
2000-04-25  Jesper Skov  <[e-mail]>

	* tests/kcache1.c: Fixed cache check to also look for unified
	caches.

2000-04-19  Jesper Skov  <[e-mail]>

	* tests/clockcnv.cxx:
	* tests/dhrystone.c:
	Only a few laps around the block on the v850...

2000-04-13  Nick Garnett  <[e-mail]>

	* include/clock.hxx:
	* src/common/clock.cxx:
	Added Cyg_Alarm::get_times() member function to allow reading of
	trigger and interval values from an alarm.

2000-04-12  Nick Garnett  <[e-mail]>

	* include/sched.hxx:
	* src/sched/sched.cxx:
	Added ASR support.

	* include/thread.hxx:
	Made Cyg_ThreadQueue::empty() an inline in class definition.

	* src/common/thread.cxx:
	Added CYG_REPORT_FUNCTION() to Cyg_Thread::exit().

	* include/kapidata.h:
	Brought thread structures up to date with kernel objects.

	* cdl/thread.cdl: 
	* cdl/scheduler.cdl:
	Added ASR configuration, minor tidies.

2000-04-12  Gary Thomas  <[e-mail]>

	* src/common/kapi.cxx (cyg_scheduler_safe_lock): 
	* include/kapi.h: Add 'cyg_scheduler_safe_lock()' function.

2000-04-12  Jesper Skov  <[e-mail]>

	* cdl/interrupts.cdl: 
	* cdl/scheduler.cdl: 
	* cdl/counters.cdl: 
	Don't let interfaces define anything.
	
2000-04-07  Nick Garnett  <[e-mail]>

	* include/sched.hxx:
	* include/thread.inl: 
	* src/sync/mutex.cxx: 
	* src/sched/sched.cxx: 
	* src/common/thread.cxx: 
	General reorganization of priority inversion protocol support,
	addition of priority ceiling protocol.

	* include/mlqueue.hxx:
	* src/sched/mlqueue.cxx: 
	Added timeslicing enable support.

	* cdl/thread.cdl: 
	* cdl/synch.cdl:
	Reorganized priority inversion protocol configuration to permit
	different protocols and dynamic choice.  Added configuration for
	condition variables to use a user-specified mutex.

	* cdl/scheduler.cdl:
	Added dynamic timeslicing enable option.

	* include/kapidata.h:
	Adjusted to match changes in other header files.

	* tests/mutex3.cxx: 
	* tests/sync3.cxx: 
	Modified these tests to match new priority inversion protocols
	configuration options.
	
2000-03-28  John Dallaway  <[e-mail]>

	* cdl/counters.cdl,
	  cdl/interrupts.cdl,
	  cdl/kernel.cdl,
	  cdl/scheduler.cdl,
	  cdl/synch.cdl,
	  cdl/thread.cdl:

	Adjust documentation URLs.

2000-03-27  Gary Thomas  <[e-mail]>

	* tests/except1.cxx: 
	* tests/kexcept1.c: Avoid trying to generate data access errors
	on platforms that don't support them.

	* tests/kcache1.c: Ignore test if no [data] caches defined.

	* tests/stress_threads.c: Infer minimal configuration for platforms
	with small amount of memory (as opposed to platform special cases).

2000-03-27  Jesper Skov  <[e-mail]>

	* src/sync/mutex.cxx: 
	* src/sched/sched.cxx: 
	* src/common/thread.cxx: 
	* src/common/clock.cxx:
	Use cyg_bool instead of bool for check_this().

	* tests/dhrystone.c: Requires CYGPKG_LIBC_MALLOC

2000-03-07  Jesper Skov  <[e-mail]>

	* tests/mutex3.cxx: Minor tweak from Hugo to allow reduced runtime
	on sims.

2000-02-29  Jonathan Larmour  <[e-mail]>

	* src/debug/dbg-thread-demux.c:
	CYG_HAL_SPARCLITE_SLEB -> CYGPKG_HAL_SPARCLITE_SLEB
	Also fix a comment typo

2000-02-29  Jesper Skov  <[e-mail]>

	* tests/kcache1.c: Don't run last part of test on MIPS sim - it's
	very slow.

2000-02-25  Jesper Skov  <[e-mail]>

	* tests/dhrystone.c: 
	* tests/tm_basic.cxx: 
	Don't allow use of devices for diag output when running performace
	tests.

2000-02-17  Jonathan Larmour  <[e-mail]>

	* include/pkgconf/kernel.h: Make
	CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INHERITANCE_SIMPLE a cdl_component
	since it has children now

2000-02-17  Jesper Skov  <[e-mail]>
	CR101202, CR902078
	* include/mvarimpl.inl: Avoid unlinking the list from the head
	during coalescing.

2000-02-11  Jesper Skov  <[e-mail]>

	* tests/dhrystone.c (PASSES): Reduced for MPC8xx targets.

2000-02-10  Jesper Skov  <[e-mail]>

	* tests/except1.cxx (except0_main): 
	* tests/kexcept1.c (except0_main):
	Also reclaim DATA_TLB_MISS vector if available.

2000-02-03  Jesper Skov  <[e-mail]>

	* src/sched/lottery.cxx (schedule): CYG_HAL_POWERPC_x->CYGPKG_...

2000-02-01  Jonathan Larmour  <[e-mail]>

	* tests/tm_basic.cxx (NTEST_THREADS): Reduce further to fit on small
	targets
	(NMBOXES): Likewise
	(NCOUNTERS): Likewise

	* src/common/clock.cxx: Rework last change - change types of
	clock_dsr_read and delta to unsigned instead

2000-01-31  Jonathan Larmour  <[e-mail]>

	* src/common/clock.cxx (isr): Use HAL_CLOCK_LATENCY, not HAL_CLOCK_READ
	(dsr): Likewise
	
	* cdl/counters.cdl (CYGVAR_KERNEL_COUNTERS_CLOCK_DSR_LATENCY): 
	Copy configury for this option here from include/pkgconf/kernel.h - it
	was left behind by accident

2000-01-31 Simon FitzMaurice  <[e-mail]>
  * cdl/*.cdl:

  Adjust help URLs in line with new doc layout.
  
2000-01-31  Jesper Skov  <[e-mail]>

	* tests/tm_basic.cxx: Use CYG_TEST_NA insetad of PASS when not
	applicable.

2000-01-28 Simon FitzMaurice  <[e-mail]>
  * cdl/*.cdl:

  Adjust help URLs in line with new doc la