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+ ____ _ _
+ | _ \| |_| |__
+ | |_) | __| '_ \ ``Only those who attempt
+ | __/| |_| | | | the absurd can achieve
+ |_| \__|_| |_| the impossible.''
+
+ GNU Pth - The GNU Portable Threads
+ Version 1.4
+
+ Pth is a very portable POSIX/ANSI-C based library for Unix platforms
+ which provides non-preemptive priority-based scheduling for multiple
+ threads of execution (aka "multithreading") inside event-driven
+ applications. All threads run in the same address space of the server
+ application, but each thread has its own individual program-counter,
+ run-time stack, signal mask and errno variable.
+
+ The thread scheduling itself is done in a cooperative way, i.e., the
+ threads are managed and dispatched by a priority- and event-driven
+ non-preemptive scheduler. The intention is that this way both better
+ portability and run-time performance is achieved than with preemptive
+ scheduling. The event facility allows threads to wait until various
+ types of internal and external events occur, including pending I/O on
+ file descriptors, asynchronous signals, elapsed timers, pending I/O
+ on message ports, thread and process termination, and even results of
+ customized callback functions.
+
+ Pth also provides an optional emulation API for POSIX.1c threads
+ ("Pthreads") which can be used for backward compatibility to existing
+ multithreaded applications.
+
+ Pth 1.4 has an even more extensive support for auto-configuring
+ the package to work on the different Unix platforms without the
+ requirement for the end user to manually adjust the package.
+ Additionally the underlying thread creation and dispatching mechanism
+ was greatly enhanced and cleaned up, too. With this, version 1.4 now
+ was successfully built and tested on numerous Unix platforms, ranging
+ from the major ones like GNU/Linux, FreeBSD, NetBSD, OpenBSD, BSDI,
+ Solaris, HPUX, Tru64, AIX, IRIX, UnixWare and SCO, to more esoteric
+ flavors like SINIX, ReliantUNIX, ISC, SCO, NCR, AmigaOS, Rhapsody
+ (MacOS X), FTX, AUX and Win32/Cygwin.
+
+ Additionally the auto-configuration mechanism allows GNU Pth to
+ automatically adjusts itself to run also on mostly all remaining Unix
+ platforms, including ancient versions for which a multi-threading
+ environment never existed before. This is especially achieved in Pth
+ by not using any assembly code or platform specific solutions and by
+ using a very tricky but portable thread creation fallback approach
+ which will be published in great detail on the USENIX 2000 Annual
+ Conference this summer.
+
+ http://www.gnu.org/software/pth/
+ ftp://ftp.gnu.org/gnu/pth/
+ Ralf S. Engelschall
+ rse@engelschall.com
+ www.engelschall.com
+
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