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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-01-11 18:19:09 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-01-11 18:19:09 +0000 |
commit | 3b0eb489665d4d8422d34309a13b20fcf65f637a (patch) | |
tree | 865e706cf0ed1dbe84005bee16774f4f97055b4b /nuttx/arch/z16/src/common/up_releasepending.c | |
parent | ddfaa63ee4ff54b4f875b33cc62823fe73419164 (diff) | |
download | px4-nuttx-3b0eb489665d4d8422d34309a13b20fcf65f637a.tar.gz px4-nuttx-3b0eb489665d4d8422d34309a13b20fcf65f637a.tar.bz2 px4-nuttx-3b0eb489665d4d8422d34309a13b20fcf65f637a.zip |
untest z16f code
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@553 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/z16/src/common/up_releasepending.c')
-rw-r--r-- | nuttx/arch/z16/src/common/up_releasepending.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/arch/z16/src/common/up_releasepending.c b/nuttx/arch/z16/src/common/up_releasepending.c new file mode 100644 index 000000000..13586a7ba --- /dev/null +++ b/nuttx/arch/z16/src/common/up_releasepending.c @@ -0,0 +1,137 @@ +/**************************************************************************** + * common/up_releasepending.c + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <sys/types.h> +#include <sched.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <chip/chip.h> + +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * 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 _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + + lldbg("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 (IN_INTERRUPT) + { + /* Yes, then we have to do things differently. + * Just copy the current context into the OLD rtcb. + */ + + SAVE_IRQCONTEXT(rtcb); + + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then setup so that the context will be performed on exit + * from the interrupt. + */ + + SET_IRQCONTEXT(rtcb); + } + + /* Copy the exception context into the TCB of the task that + * was currently active. if SAVE_USERCONTEXT returns a non-zero + * value, then this is really the previously running task + * restarting! + */ + + else if (!SAVE_USERCONTEXT(rtcb)) + { + /* Restore the exception context of the rtcb at the (new) head + * of the g_readytorun task list. + */ + + rtcb = (FAR _TCB*)g_readytorun.head; + lldbg("New Active Task TCB=%p\n", rtcb); + + /* Then switch contexts */ + + RESTORE_USERCONTEXT(rtcb); + } + } +} |