diff options
Diffstat (limited to 'misc/Obsoleted/arch/8051/src/up_releasepending.c')
-rw-r--r-- | misc/Obsoleted/arch/8051/src/up_releasepending.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/misc/Obsoleted/arch/8051/src/up_releasepending.c b/misc/Obsoleted/arch/8051/src/up_releasepending.c new file mode 100644 index 000000000..ebb5271a6 --- /dev/null +++ b/misc/Obsoleted/arch/8051/src/up_releasepending.c @@ -0,0 +1,135 @@ +/************************************************************************ + * up_releasepending.c + * + * Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include <nuttx/config.h> + +#include <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> + +#include "sched/sched.h" +#include "up_internal.h" + +/************************************************************************ + * Private Definitions + ************************************************************************/ + +/************************************************************************ + * Private Data + ************************************************************************/ + +/************************************************************************ + * Private Funtions + ************************************************************************/ + +/************************************************************************ + * Public Funtions + ************************************************************************/ + +/************************************************************************ + * Name: up_release_pending + * + * Description: + * Release and ready-to-run tasks that have + * collected in the pending task list. This can call a + * context switch if a new task is placed at the head of + * the ready to run list. + * + ************************************************************************/ + +void up_release_pending(void) +{ + FAR struct tcb_s *rtcb = (FAR struct tcb_s*)g_readytorun.head; + + dbg("From TCB=%p\n", rtcb); + + /* Merge the g_pendingtasks list into the g_readytorun task list */ + + /* sched_lock(); */ + if (sched_mergepending()) + { + /* The currently active task has changed! We will need to + * switch contexts. First check if we are operating in + * interrupt context: + */ + + if (g_irqtos) + { + /* Yes, then we have to do things differently. + * Just copy the current registers into the OLD rtcb. + */ + + up_saveirqcontext(&rtcb->xcp); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR struct tcb_s*)g_readytorun.head; + dbg("New Active Task TCB=%p\n", rtcb); + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + g_irqcontext = &rtcb->xcp; + } + + /* Copy the exception context into the TCB of the task that + * was currently active. if up_savecontext returns a non-zero + * value, then this is really the previously running task + * restarting! + */ + + else if (!up_savecontext(&rtcb->xcp)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR struct tcb_s*)g_readytorun.head; + dbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + up_restorecontext(&rtcb->xcp); + } + } +} |