``A Library Implementation of POSIX Threads for the SPARC / ix86'', Version 3.14 The PART (POSIX / Ada-Runtime Project) is happy to announce a new release of the C sources of the Pthreads library. FSU PThreads Sources: USA: ftp://ftp.cs.fsu.edu/pub/PART/PTHREADS/pthreads.tar.gz OR pthreads.zip Europe: http://www.informatik.hu-berlin.de/~mueller/ftp/pub/PART/pthreads.tar.gz Thread Debugger Sources / Binaries: USA: http://www.cs.fsu.edu/~mueller/TDI Europe: http://www.informatik.hu-berlin.de/~mueller/TDI Papers: USA: http://www.cs.fsu.edu/~mueller/pthreads Europe: http://www.informatik.hu-berlin.de/~mueller/pthreads mail-list: mueller@informatik.hu-berlin.de Subject: subscribe-pthreads There is also a Pthreads mailing list distributing information about new releases, bug patches and related issues. You can subscribe to the mailing list either - by sending e-mail to "mueller@informatik.hu-berlin.de" with the subject line "subscribe-pthreads". [If your local mailer inserts an incorrect return address, send mail message with a different subject and include your correct e-mail address.] As part of the PART project we have been designing and implementing a library package of preemptive threads which is compliant with POSIX 1003.1c. A description of the interface for our Pthreads library is also available on ftp. Our implementation is limited to the Sun SPARC architecture under SunOS 4.1.x / Solaris 2.x as well as Intel ix86 architecture under Linux, SCO, FreeBSD or DOS. We do not make any use of Sun's light-weight processes to achieve better performance (with one I/O-related exception). What's NEW: /* .update: more enhancements for gdb debugging support via TDI, for details see: http://www.informatik.hu-berlin.de/~mueller/TDI/ .update: faster I/O for Linux/FreeBSD with async I/O (no fd_server thread) .update: Solaris 2.8 support .update: Linux latest experimental glibc support .bug fix: SunOS: COMP_C3 needed for signal.o .bug fix: SCO: SEGV when no thread ready after SIGCHLD (problem and fix by: Lucian B Landry ) The following features are included in the current implementation: -from POSIX.1c: .thread management: initializing, creating, joining, exiting, and destroying threads .synchronization: mutual exclusion, condition variables .thread-specific data .thread priority scheduling: priority management, preemptive priority scheduling (FIFO, RR), mutex priority ceilings through stack resource policy (SRP) .signals: signal handlers, synchronous and asynchronous wait for signals, masking and sending of signals, sleep, long jumps .cancellation: cleanup handlers, asynchronous, synchronous, and disabled interruptability. -from POSIX.1b: .timers: nanosleep, read clock, priority scheduling bounds -from POSIX.1: .synchronous I/O for threads (I/O only blocks current thread, not process) -others: .perverted scheduling for debugging (MUT_SWITCH, RR_SWITCH, RAND_SWITCH) .stack overflow check causes signal (optional STACK_CHECK) .graceful handling of stack overflow (optional SIGNAL_STACK) .repeated inclusion of header files prevented The support is currently being extended to include: -from POSIX.1c: .process control: fork, wait, waitpid (The above functions are not supported for threads. Their semantics is whatever UNIX semantics for processes is. Consequently, a fork will fork another process with ALL threads being duplicated, not just the executing thread as required by POSIX.4a. The functions exec and _exit behave as required without any change, i.e. the UNIX process level semantics for these functions is also adequate for threads.) -from POSIX.1: .asynchronous timer objects -other: .heap memory pools The current scheduling policies are strict priority scheduling (according to POSIX.1c FIFO scheduling) which preempts when signals are caught or round-robin (RR scheduling) which changes context to another thread of the same priority after a time-slice of 20msec. Besides asynchronous delivery of signals, context switches only occur where required by the priority policy, e.g. when resources (mutexes) are locked etc. "The current implementation has been tested and used as a base to implement the GNu Ada Runtime Library (GNARL) for the Gnu NYU Ada Translator (GNAT, see ftp://ftp.cs.nyu.edu/pub/gnat/). But we do not make any claims about the completeness or correctness of this implementation. (C)OPYRIGHT NOTICE: Copyright (C) 1992-2000 the Florida State University Distributed by the Florida State University under the terms of the GNU Library General Public License. This file is part of Pthreads. Pthreads is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation (version 2). Pthreads is distributed "AS IS" in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with Pthreads; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. Report problems and direct all questions to: pthreads-bugs@ada.cs.fsu.edu