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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'pthreads/WinCE-PORT')
-rw-r--r--pthreads/WinCE-PORT217
1 files changed, 217 insertions, 0 deletions
diff --git a/pthreads/WinCE-PORT b/pthreads/WinCE-PORT
new file mode 100644
index 000000000..f5981a9db
--- /dev/null
+++ b/pthreads/WinCE-PORT
@@ -0,0 +1,217 @@
+NOTE: The comments in this file relate to the original WinCE port
+done by Tristan Savatier. The semaphore routines have been
+completely rewritten since (2005-04-25), having been progressively
+broken more and more by changes to the library. All of the semaphore
+routines implemented for W9x/WNT/2000 and up should now also work for
+WinCE. Also, pthread_mutex_timedlock should now work. [RPJ]
+
+----
+
+Some interesting news:
+
+I have been able to port pthread-win32 to Windows-CE,
+which uses a subset of the WIN32 API.
+
+Since we intend to keep using pthread-win32 for our
+Commercial WinCE developments, I would be very interested
+if WinCE support could be added to the main source tree
+of pthread-win32. Also, I would like to be credited
+for this port :-)
+
+Now, here is the story...
+
+The port was performed and tested on a Casio "Cassiopeia"
+PalmSize PC, which runs a MIP processor. The OS in the
+Casio is WinCE version 2.11, but I used VC++ 6.0 with
+the WinCE SDK for version 2.01.
+
+I used pthread-win32 to port a heavily multithreaded
+commercial application (real-time MPEG video player)
+from Linux to WinCE. I consider the changes that
+I have done to be quite well tested.
+
+Overall the modifications that we had to do are minor.
+
+The WinCE port were based on pthread-win32-snap-1999-05-30,
+but I am certain that they can be integrated very easiely
+to more recent versions of the source.
+
+I have attached the modified source code:
+pthread-win32-snap-1999-05-30-WinCE.
+
+All the changes do not affect the code compiled on non-WinCE
+environment, provided that the macros used for WinCE compilation
+are not used, of course!
+
+Overall description of the WinCE port:
+-------------------------------------
+
+Most of the changes had to be made in areas where
+pthread-win32 was relying on some standard-C librairies
+(e.g. _ftime, calloc, errno), which are not available
+on WinCE. We have changed the code to use native Win32
+API instead (or in some cases we made wrappers).
+
+The Win32 Semaphores are not available,
+so we had to re-implement Semaphores using mutexes
+and events.
+
+Limitations / known problems of the WinCE port:
+----------------------------------------------
+
+Not all the semaphore routines have been ported
+(semaphores are defined by Posix but are not part
+pf pthread). I have just done enough to make
+pthread routines (that rely internally on semaphores)
+work, like signal conditions.
+
+I noticed that the Win32 threads work slightly
+differently on WinCE. This may have some impact
+on some tricky parts of pthread-win32, but I have
+not really investigated. For example, on WinCE,
+the process is killed if the main thread falls off
+the bottom (or calls pthread_exit), regardless
+of the existence of any other detached thread.
+Microsoft manual indicates that this behavior is
+deffirent from that of Windows Threads for other
+Win32 platforms.
+
+
+Detailed descriptions of the changes and rationals:
+
+------------------------------------
+- use a new macro NEED_ERRNO.
+
+If defined, the code in errno.c that defines a reentrant errno
+is compiled, regardless of _MT and _REENTRANT.
+
+Rational: On WinCE, there is no support for <stdio.h>, <errno.h> or
+any other standard C library, i.e. even if _MT or _REENTRANT
+is defined, errno is not provided by any library. NEED_ERRNO
+must be set to compile for WinCE.
+
+------------------------------------
+- In implement.h, change #include <semaphore.h> to #include "semaphore.h".
+
+Rational: semaphore.h is provided in pthread-win32 and should not
+be searched in the systems standard include. would not compile.
+This change does not seem to create problems on "classic" win32
+(e.g. win95).
+
+------------------------------------
+- use a new macro NEED_CALLOC.
+
+If defined, some code in misc.c will provide a replacement
+for calloc, which is not available on Win32.
+
+
+------------------------------------
+- use a new macro NEED_CREATETHREAD.
+
+If defined, implement.h defines the macro _beginthreadex
+and _endthreadex.
+
+Rational: On WinCE, the wrappers _beginthreadex and _endthreadex
+do not exist. The native Win32 routines must be used.
+
+------------------------------------
+- in misc.c:
+
+#ifdef NEED_DUPLICATEHANDLE
+ /* DuplicateHandle does not exist on WinCE */
+ self->threadH = GetCurrentThread();
+#else
+ if( !DuplicateHandle(
+ GetCurrentProcess(),
+ GetCurrentThread(),
+ GetCurrentProcess(),
+ &self->threadH,
+ 0,
+ FALSE,
+ DUPLICATE_SAME_ACCESS ) )
+ {
+ free( self );
+ return (NULL);
+ }
+#endif
+
+Rational: On WinCE, DuplicateHandle does not exist. I could not understand
+why DuplicateHandle must be used. It seems to me that getting the current
+thread handle with GetCurrentThread() is sufficient, and it seems to work
+perfectly fine, so maybe DuplicateHandle was just plain useless to begin with ?
+
+------------------------------------
+- In private.c, added some code at the beginning of ptw32_processInitialize
+to detect the case of multiple calls to ptw32_processInitialize.
+
+Rational: In order to debug pthread-win32, it is easier to compile
+it as a regular library (it is not possible to debug DLL's on winCE).
+In that case, the application must call ptw32_rocessInitialize()
+explicitely, to initialize pthread-win32. It is safer in this circumstance
+to handle the case where ptw32_processInitialize() is called on
+an already initialized library:
+
+int
+ptw32_processInitialize (void)
+{
+ if (ptw32_processInitialized) {
+ /*
+ * ignore if already initialized. this is useful for
+ * programs that uses a non-dll pthread
+ * library. such programs must call ptw32_processInitialize() explicitely,
+ * since this initialization routine is automatically called only when
+ * the dll is loaded.
+ */
+ return TRUE;
+ }
+ ptw32_processInitialized = TRUE;
+ [...]
+}
+
+------------------------------------
+- in private.c, if macro NEED_FTIME is defined, add routines to
+convert timespec_to_filetime and filetime_to_timespec, and modified
+code that was using _ftime() to use Win32 API instead.
+
+Rational: _ftime is not available on WinCE. It is necessary to use
+the native Win32 time API instead.
+
+Note: the routine timespec_to_filetime is provided as a convenience and a mean
+to test that filetime_to_timespec works, but it is not used by the library.
+
+------------------------------------
+- in semaphore.c, if macro NEED_SEM is defined, add code for the routines
+_increase_semaphore and _decrease_semaphore, and modify significantly
+the implementation of the semaphores so that it does not use CreateSemaphore.
+
+Rational: CreateSemaphore is not available on WinCE. I had to re-implement
+semaphores using mutexes and Events.
+
+Note: Only the semaphore routines that are used by pthread are implemented
+(i.e. signal conditions rely on a subset of the semaphores routines, and
+this subset works). Some other semaphore routines (e.g. sem_trywait) are
+not yet supported on my WinCE port (and since I don't need them, I am not
+planning to do anything about them).
+
+------------------------------------
+- in tsd.c, changed the code that defines TLS_OUT_OF_INDEXES
+
+/* TLS_OUT_OF_INDEXES not defined on WinCE */
+#ifndef TLS_OUT_OF_INDEXES
+#define TLS_OUT_OF_INDEXES 0xffffffff
+#endif
+
+Rational: TLS_OUT_OF_INDEXES is not defined in any standard include file
+on WinCE.
+
+------------------------------------
+- added file need_errno.h
+
+Rational: On WinCE, there is no errno.h file. need_errno.h is just a
+copy of windows version of errno.h, with minor modifications due to the fact
+that some of the error codes are defined by the WinCE socket library.
+In pthread.h, if NEED_ERRNO is defined, the file need_errno.h is
+included (instead of <errno.h>).
+
+
+-- eof