+++ /dev/null
-// Package : omnithread
-// omnithread/solaris.cc Created : 7/94 tjr
-//
-// Copyright (C) 1994-1999 AT&T Laboratories Cambridge
-//
-// This file is part of the omnithread library
-//
-// The omnithread library 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; either
-// version 2 of the License, or (at your option) any later version.
-//
-// This library is distributed 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 this library; if not, write to the Free
-// Software Foundation, Inc., 51 Franklin Street, Boston, MA
-// 02110-1301, USA
-//
-//
-// Implementation of OMNI thread abstraction for solaris threads.
-//
-
-#include <stdlib.h>
-#include <errno.h>
-#include <omnithread.h>
-
-#define DB(x) // x
-// #include <iostream> or #include <iostream.h> if DB is on.
-
-#define THROW_ERRORS(x) { int rc = (x); \
- if (rc != 0) throw omni_thread_fatal(rc); }
-
-
-
-///////////////////////////////////////////////////////////////////////////
-//
-// Mutex
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-omni_mutex::omni_mutex(void)
-{
- THROW_ERRORS(mutex_init(&sol_mutex, USYNC_THREAD, 0));
-}
-
-omni_mutex::~omni_mutex(void)
-{
- THROW_ERRORS(mutex_destroy(&sol_mutex));
-}
-
-void
-omni_mutex::lock(void)
-{
- THROW_ERRORS(mutex_lock(&sol_mutex));
-}
-
-void
-omni_mutex::unlock(void)
-{
- THROW_ERRORS(mutex_unlock(&sol_mutex));
-}
-
-
-
-///////////////////////////////////////////////////////////////////////////
-//
-// Condition variable
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-omni_condition::omni_condition(omni_mutex* m) : mutex(m)
-{
- THROW_ERRORS(cond_init(&sol_cond, USYNC_THREAD, 0));
-}
-
-omni_condition::~omni_condition(void)
-{
- THROW_ERRORS(cond_destroy(&sol_cond));
-}
-
-void
-omni_condition::wait(void)
-{
- THROW_ERRORS(cond_wait(&sol_cond, &mutex->sol_mutex));
-}
-
-int
-omni_condition::timedwait(unsigned long secs, unsigned long nanosecs)
-{
- timespec rqts = { secs, nanosecs };
-
- again:
- int rc = cond_timedwait(&sol_cond, &mutex->sol_mutex, &rqts);
-
- if (rc == 0)
- return 1;
-
- if (rc == EINTR)
- goto again;
-
- if (rc == ETIME)
- return 0;
-
- throw omni_thread_fatal(rc);
-}
-
-void
-omni_condition::signal(void)
-{
- THROW_ERRORS(cond_signal(&sol_cond));
-}
-
-void
-omni_condition::broadcast(void)
-{
- THROW_ERRORS(cond_broadcast(&sol_cond));
-}
-
-
-
-///////////////////////////////////////////////////////////////////////////
-//
-// Counting semaphore
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-omni_semaphore::omni_semaphore(unsigned int initial)
-{
- THROW_ERRORS(sema_init(&sol_sem, initial, USYNC_THREAD, NULL));
-}
-
-omni_semaphore::~omni_semaphore(void)
-{
- THROW_ERRORS(sema_destroy(&sol_sem));
-}
-
-void
-omni_semaphore::wait(void)
-{
- THROW_ERRORS(sema_wait(&sol_sem));
-}
-
-void
-omni_semaphore::post(void)
-{
- THROW_ERRORS(sema_post(&sol_sem));
-}
-
-
-
-///////////////////////////////////////////////////////////////////////////
-//
-// Thread
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-//
-// Static variables
-//
-
-int omni_thread::init_t::count = 0;
-
-omni_mutex* omni_thread::next_id_mutex;
-int omni_thread::next_id = 0;
-
-static thread_key_t self_key;
-
-static size_t stack_size = 0;
-
-//
-// Initialisation function (gets called before any user code).
-//
-
-omni_thread::init_t::init_t(void)
-{
- if (count++ != 0) // only do it once however many objects get created.
- return;
-
- DB(cerr << "omni_thread::init: solaris implementation initialising\n");
-
- THROW_ERRORS(thr_keycreate(&self_key, NULL));
-
- next_id_mutex = new omni_mutex;
-
- //
- // Create object for this (i.e. initial) thread.
- //
-
- omni_thread* t = new omni_thread;
-
- t->_state = STATE_RUNNING;
-
- t->sol_thread = thr_self();
-
- DB(cerr << "initial thread " << t->id() << " sol_thread " << t->sol_thread
- << endl);
-
- THROW_ERRORS(thr_setspecific(self_key, (void*)t));
-
- THROW_ERRORS(thr_setprio(t->sol_thread, sol_priority(PRIORITY_NORMAL)));
-}
-
-
-//
-// Wrapper for thread creation.
-//
-
-extern "C" void*
-omni_thread_wrapper(void* ptr)
-{
- omni_thread* me = (omni_thread*)ptr;
-
- DB(cerr << "omni_thread::wrapper: thread " << me->id()
- << " started\n");
-
- THROW_ERRORS(thr_setspecific(self_key, me));
-
- //
- // Now invoke the thread function with the given argument.
- //
-
- if (me->fn_void != NULL) {
- (*me->fn_void)(me->thread_arg);
- omni_thread::exit();
- }
-
- if (me->fn_ret != NULL) {
- void* return_value = (*me->fn_ret)(me->thread_arg);
- omni_thread::exit(return_value);
- }
-
- if (me->detached) {
- me->run(me->thread_arg);
- omni_thread::exit();
- } else {
- void* return_value = me->run_undetached(me->thread_arg);
- omni_thread::exit(return_value);
- }
-
- // should never get here.
-
- return NULL;
-}
-
-
-//
-// Constructors for omni_thread - set up the thread object but don't
-// start it running.
-//
-
-// construct a detached thread running a given function.
-
-omni_thread::omni_thread(void (*fn)(void*), void* arg, priority_t pri)
-{
- common_constructor(arg, pri, 1);
- fn_void = fn;
- fn_ret = NULL;
-}
-
-// construct an undetached thread running a given function.
-
-omni_thread::omni_thread(void* (*fn)(void*), void* arg, priority_t pri)
-{
- common_constructor(arg, pri, 0);
- fn_void = NULL;
- fn_ret = fn;
-}
-
-// construct a thread which will run either run() or run_undetached().
-
-omni_thread::omni_thread(void* arg, priority_t pri)
-{
- common_constructor(arg, pri, 1);
- fn_void = NULL;
- fn_ret = NULL;
-}
-
-// common part of all constructors.
-
-void
-omni_thread::common_constructor(void* arg, priority_t pri, int det)
-{
- _state = STATE_NEW;
- _priority = pri;
-
- next_id_mutex->lock();
- _id = next_id++;
- next_id_mutex->unlock();
-
- thread_arg = arg;
- detached = det; // may be altered in start_undetached()
-
- _dummy = 0;
- _values = 0;
- _value_alloc = 0;
- // sol_thread is set up in initialisation routine or start().
-}
-
-
-//
-// Destructor for omni_thread.
-//
-
-omni_thread::~omni_thread(void)
-{
- DB(cerr << "destructor called for thread " << id() << endl);
- if (_values) {
- for (key_t i=0; i < _value_alloc; i++) {
- if (_values[i]) {
- delete _values[i];
- }
- }
- delete [] _values;
- }
-}
-
-
-//
-// Start the thread
-//
-
-void
-omni_thread::start(void)
-{
- long flags = 0;
-
- if (detached)
- flags |= THR_DETACHED;
-
- omni_mutex_lock l(mutex);
-
- if (_state != STATE_NEW)
- throw omni_thread_invalid();
-
- THROW_ERRORS(thr_create(0, stack_size, omni_thread_wrapper, (void*)this, flags,
- &sol_thread));
-
- _state = STATE_RUNNING;
-
- THROW_ERRORS(thr_setprio(sol_thread, sol_priority(_priority)));
-}
-
-
-//
-// Start a thread which will run the member function run_undetached().
-//
-
-void
-omni_thread::start_undetached(void)
-{
- if ((fn_void != NULL) || (fn_ret != NULL))
- throw omni_thread_invalid();
-
- detached = 0;
- start();
-}
-
-
-//
-// join - simply check error conditions & call thr_join.
-//
-
-void
-omni_thread::join(void** status)
-{
- mutex.lock();
-
- if ((_state != STATE_RUNNING) && (_state != STATE_TERMINATED)) {
- mutex.unlock();
- throw omni_thread_invalid();
- }
-
- mutex.unlock();
-
- if (this == self())
- throw omni_thread_invalid();
-
- if (detached)
- throw omni_thread_invalid();
-
- DB(cerr << "omni_thread::join: doing thr_join\n");
-
- THROW_ERRORS(thr_join(sol_thread, (thread_t *)NULL, status));
-
- DB(cerr << "omni_thread::join: thr_join succeeded\n");
-
- delete this;
-}
-
-
-//
-// Change this thread's priority.
-//
-
-void
-omni_thread::set_priority(priority_t pri)
-{
- omni_mutex_lock l(mutex);
-
- if (_state != STATE_RUNNING)
- throw omni_thread_invalid();
-
- _priority = pri;
-
- THROW_ERRORS(thr_setprio(sol_thread, sol_priority(pri)));
-}
-
-
-//
-// create - construct a new thread object and start it running. Returns thread
-// object if successful, null pointer if not.
-//
-
-// detached version
-
-omni_thread*
-omni_thread::create(void (*fn)(void*), void* arg, priority_t pri)
-{
- omni_thread* t = new omni_thread(fn, arg, pri);
-
- t->start();
-
- return t;
-}
-
-// undetached version
-
-omni_thread*
-omni_thread::create(void* (*fn)(void*), void* arg, priority_t pri)
-{
- omni_thread* t = new omni_thread(fn, arg, pri);
-
- t->start();
-
- return t;
-}
-
-
-//
-// exit() _must_ lock the mutex even in the case of a detached thread. This is
-// because a thread may run to completion before the thread that created it has
-// had a chance to get out of start(). By locking the mutex we ensure that the
-// creating thread must have reached the end of start() before we delete the
-// thread object. Of course, once the call to start() returns, the user can
-// still incorrectly refer to the thread object, but that's their problem.
-//
-
-void
-omni_thread::exit(void* return_value)
-{
- omni_thread* me = self();
-
- if (me)
- {
- me->mutex.lock();
-
- me->_state = STATE_TERMINATED;
-
- me->mutex.unlock();
-
- DB(cerr << "omni_thread::exit: thread " << me->id() << " detached "
- << me->detached << " return value " << return_value << endl);
-
- if (me->detached)
- delete me;
- }
- else
- {
- DB(cerr << "omni_thread::exit: called with a non-omnithread. Exit quietly." << endl);
- }
-
- thr_exit(return_value);
-}
-
-
-omni_thread*
-omni_thread::self(void)
-{
- omni_thread* me;
-
- THROW_ERRORS(thr_getspecific(self_key, (void**)&me));
-
- if (!me) {
- // This thread is not created by omni_thread::start because it
- // doesn't has a class omni_thread instance attached to its key.
- DB(cerr << "omni_thread::self: called with a non-ominthread. NULL is returned." << endl);
- }
-
- return me;
-}
-
-
-void
-omni_thread::yield(void)
-{
- thr_yield();
-}
-
-
-void
-omni_thread::sleep(unsigned long secs, unsigned long nanosecs)
-{
- timespec rqts = { secs, nanosecs };
- timespec remain;
- while (nanosleep(&rqts, &remain)) {
- if (errno == EINTR) {
- rqts.tv_sec = remain.tv_sec;
- rqts.tv_nsec = remain.tv_nsec;
- continue;
- }
- else
- throw omni_thread_fatal(errno);
- }
-}
-
-
-void
-omni_thread::get_time(unsigned long* abs_sec, unsigned long* abs_nsec,
- unsigned long rel_sec, unsigned long rel_nsec)
-{
- timespec abs;
- clock_gettime(CLOCK_REALTIME, &abs);
- abs.tv_nsec += rel_nsec;
- abs.tv_sec += rel_sec + abs.tv_nsec / 1000000000;
- abs.tv_nsec = abs.tv_nsec % 1000000000;
- *abs_sec = abs.tv_sec;
- *abs_nsec = abs.tv_nsec;
-}
-
-
-int
-omni_thread::sol_priority(priority_t pri)
-{
- switch (pri) {
-
- case PRIORITY_LOW:
- return 0;
-
- case PRIORITY_NORMAL:
- return 1;
-
- case PRIORITY_HIGH:
- return 2;
- }
-
- throw omni_thread_invalid();
-}
-
-
-void
-omni_thread::stacksize(unsigned long sz)
-{
- stack_size = sz;
-}
-
-unsigned long
-omni_thread::stacksize()
-{
- return stack_size;
-}
-
-
-//
-// Dummy thread
-//
-
-#error This dummy thread code is not tested. It might work if you're lucky.
-
-class omni_thread_dummy : public omni_thread {
-public:
- inline omni_thread_dummy() : omni_thread()
- {
- _dummy = 1;
- _state = STATE_RUNNING;
- sol_thread = thr_self();
- THROW_ERRORS(thr_setspecific(self_key, (void*)this));
- }
- inline ~omni_thread_dummy()
- {
- THROW_ERRORS(thr_setspecific(self_key, 0));
- }
-};
-
-omni_thread*
-omni_thread::create_dummy()
-{
- if (omni_thread::self())
- throw omni_thread_invalid();
-
- return new omni_thread_dummy;
-}
-
-void
-omni_thread::release_dummy()
-{
- omni_thread* self = omni_thread::self();
- if (!self || !self->_dummy)
- throw omni_thread_invalid();
-
- omni_thread_dummy* dummy = (omni_thread_dummy*)self;
- delete dummy;
-}
-
-
-#define INSIDE_THREAD_IMPL_CC
-#include "threaddata.cc"
-#undef INSIDE_THREAD_IMPL_CC
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