X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fkern%2Fcoop.c;h=078724b42a8e38095fb93e3c6e226d2e2b5e2d70;hb=f35b6066ecdeffcc8998dd566b5246bdcf43c548;hp=aa370ae589f6c5c589b851afe817030a1dd9e224;hpb=e62ca0b357f09804d7d894949df44224c9d74bb7;p=bertos.git

diff --git a/bertos/kern/coop.c b/bertos/kern/coop.c
index aa370ae5..078724b4 100644
--- a/bertos/kern/coop.c
+++ b/bertos/kern/coop.c
@@ -26,118 +26,7 @@
  * invalidate any other reasons why the executable file might be covered by
  * the GNU General Public License.
  *
- * Copyright 2001, 2004, 2008 Develer S.r.l. (http://www.develer.com/)
- * Copyright 1999, 2000, 2001, 2008 Bernie Innocenti <bernie@codewiz.org>
- * -->
- *
- * \brief Simple cooperative multitasking scheduler.
- *
- * \version $Id: proc.c 1616 2008-08-10 19:41:26Z bernie $
- * \author Bernie Innocenti <bernie@codewiz.org>
- * \author Stefano Fedrigo <aleph@develer.com>
- */
-
-#include "proc_p.h"
-#include "proc.h"
-
-// Log settings for cfg/log.h.
-#define LOG_LEVEL   KERN_LOG_LEVEL
-#define LOG_FORMAT  KERN_LOG_FORMAT
-#include <cfg/log.h>
-
-#include <cpu/irq.h>
-#include <cpu/types.h>
-#include <cpu/attr.h>
-#include <cpu/frame.h>
-
-/**
- * CPU dependent context switching routines.
+ * \note This file is deprecated and kept only for backward compatibility.
  *
- * Saving and restoring the context on the stack is done by a CPU-dependent
- * support routine which usually needs to be written in assembly.
- */
-EXTERN_C void asm_switch_context(cpu_stack_t **new_sp, cpu_stack_t **save_sp);
-
-
-/**
- * System scheduler: pass CPU control to the next process in
- * the ready queue.
- */
-static void proc_schedule(void)
-{
-	cpu_flags_t flags;
-
-	ATOMIC(LIST_ASSERT_VALID(&ProcReadyList));
-	ASSERT_USER_CONTEXT();
-	IRQ_ASSERT_ENABLED();
-
-	/* Poll on the ready queue for the first ready process */
-	IRQ_SAVE_DISABLE(flags);
-	while (!(CurrentProcess = (struct Process *)list_remHead(&ProcReadyList)))
-	{
-		/*
-		 * Make sure we physically reenable interrupts here, no matter what
-		 * the current task status is. This is important because if we
-		 * are idle-spinning, we must allow interrupts, otherwise no
-		 * process will ever wake up.
-		 *
-		 * During idle-spinning, an interrupt can occur and it may
-		 * modify \p ProcReadyList. To ensure that compiler reload this
-		 * variable every while cycle we call CPU_MEMORY_BARRIER.
-		 * The memory barrier ensure that all variables used in this context
-		 * are reloaded.
-		 * \todo If there was a way to write sig_wait() so that it does not
-		 * disable interrupts while waiting, there would not be any
-		 * reason to do this.
-		 */
-		IRQ_ENABLE;
-		CPU_IDLE;
-		MEMORY_BARRIER;
-		IRQ_DISABLE;
-	}
-	IRQ_RESTORE(flags);
-}
-
-void proc_switch(void)
-{
-	/* Remember old process to save its context later */
-	Process * const old_process = CurrentProcess;
-
-	proc_schedule();
-
-	/*
-	 * Optimization: don't switch contexts when the active
-	 * process has not changed.
-	 */
-	if (CurrentProcess != old_process)
-	{
-		cpu_stack_t *dummy;
-
-		#if CONFIG_KERN_MONITOR
-			LOG_INFO("Switch from %p(%s) to %p(%s)\n",
-				old_process,    proc_name(old_process),
-				CurrentProcess, proc_currentName());
-		#endif
-
-		/* Save context of old process and switch to new process. If there is no
-		 * old process, we save the old stack pointer into a dummy variable that
-		 * we ignore. In fact, this happens only when the old process has just
-		 * exited.
-		 * TODO: Instead of physically clearing the process at exit time, a zombie
-		 * list should be created.
-		 */
-		asm_switch_context(&CurrentProcess->stack, old_process ? &old_process->stack : &dummy);
-	}
-
-	/* This RET resumes the execution on the new process */
-}
-
-
-/**
- * Co-operative context switch
+ * -->
  */
-void proc_yield(void)
-{
-	ATOMIC(SCHED_ENQUEUE(CurrentProcess));
-	proc_switch();
-}