/*
?*?Copyright?（c）?2010?Kelvin?Lawson.?All?rights?reserved.
?*
?*?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.?No?personal?names?or?organizations‘?names?associated?with?the
?*????Atomthreads?project?may?be?used?to?endorse?or?promote?products
?*????derived?from?this?software?without?specific?prior?written?permission.
?*
?*?THIS?SOFTWARE?IS?PROVIDED?BY?THE?ATOMTHREADS?PROJECT?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?PROJECT?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.
?*/


/**
?*?\file
?*?Kernel?library.
?*
?*
?*?This?module?implements?the?core?kernel?functionality?of?managing?threads
?*?context-switching?and?interrupt?handlers.?It?also?contains?functions?for
?*?managing?queues?of?TCBs?（task?control?blocks）?which?are?used?not?only?for
?*?the?queue?of?ready?threads?but?also?by?other?OS?primitives?（such?as
?*?semaphores）?for?generically?managing?lists?of?TCBs.
?*
?*?Core?kernel?functionality?such?as?managing?the?queue?of?ready?threads?and
?*?how?context-switch?decisions?are?made?is?described?within?the?code.?However
?*?a?quick?summary?is?as?follows:
?*
?*?There?is?a?ready?queue?of?threads.?There?must?always?be?at?least?one?thread
?*?ready-to-run.?If?no?application?threads?are?ready?the?internal?kernel?idle
?*?thread?will?be?run.?This?ensures?that?there?is?a?thread?to?run?at?all
?*?times.
?*
?*?Application?code?creates?threads?using?atomThreadCreate（）.?These?threads
?*?are?added?to?the?ready?queue?and?eventually?run?when?it?is?their?turn
?*?（based?on?priority）.?When?threads?are?currently-running?they?are?taken?off
?*?the?ready?queue.?Threads?continue?to?run?until:
?*?\li?They?schedule?themselves?out?by?calling?an?OS?primitive?which?blocks
?*?????such?as?a?timer?delay?or?blocking?on?a?semaphore.?At?this?point?they
?*?????are?placed?on?the?queue?of?the?OS?primitive?in?which?they?are?blocking
?*?????（for?example?a?timer?delay?or?semaphore）.
?*?\li?They?are?preempted

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\
?????文件?????????126??2017-08-27?10:12??atomthreads-master\.gitmodules
?????文件?????????383??2017-08-27?10:12??atomthreads-master\.travis.yml
?????文件????????1874??2017-08-27?10:12??atomthreads-master\README.md
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\kernel\
?????文件???????47659??2017-08-27?10:12??atomthreads-master\kernel\Doxyfile
?????文件????????1116??2017-08-27?10:12??atomthreads-master\kernel\README
?????文件????????5005??2017-08-27?10:12??atomthreads-master\kernel\atom.h
?????文件???????36597??2017-08-27?10:12??atomthreads-master\kernel\atomkernel.c
?????文件???????25561??2017-08-27?10:12??atomthreads-master\kernel\atommutex.c
?????文件????????2194??2017-08-27?10:12??atomthreads-master\kernel\atommutex.h
?????文件????????2985??2017-08-27?10:12??atomthreads-master\kernel\atomport-template.h
?????文件???????34316??2017-08-27?10:12??atomthreads-master\kernel\atomqueue.c
?????文件????????2637??2017-08-27?10:12??atomthreads-master\kernel\atomqueue.h
?????文件???????22987??2017-08-27?10:12??atomthreads-master\kernel\atomsem.c
?????文件????????2163??2017-08-27?10:12??atomthreads-master\kernel\atomsem.h
?????文件???????15969??2017-08-27?10:12??atomthreads-master\kernel\atomtimer.c
?????文件????????2482??2017-08-27?10:12??atomthreads-master\kernel\atomtimer.h
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\ports\
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\ports\arm\
?????文件???????47646??2017-08-27?10:12??atomthreads-master\ports\arm\Doxyfile
?????文件????????5836??2017-08-27?10:12??atomthreads-master\ports\arm\README
?????文件????????8275??2017-08-27?10:12??atomthreads-master\ports\arm\atomport-asm.s
?????文件????????1856??2017-08-27?10:12??atomthreads-master\ports\arm\atomport-private.h
?????文件????????2372??2017-08-27?10:12??atomthreads-master\ports\arm\atomport-tests.h
?????文件????????6609??2017-08-27?10:12??atomthreads-master\ports\arm\atomport.c
?????文件????????3770??2017-08-27?10:12??atomthreads-master\ports\arm\atomport.h
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\ports\arm\platforms\
?????目錄???????????0??2017-08-27?10:12??atomthreads-master\ports\arm\platforms\dm36x\
?????文件???????47646??2017-08-27?10:12??atomthreads-master\ports\arm\platforms\dm36x\Doxyfile
?????文件????????5011??2017-08-27?10:12??atomthreads-master\ports\arm\platforms\dm36x\Makefile
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