/********************************************************************
* COPYRIGHT:
* Copyright (c) 1999-2009, International Business Machines Corporation and
* others. All Rights Reserved.
********************************************************************/
#if defined(hpux)
# ifndef _INCLUDE_POSIX_SOURCE
# define _INCLUDE_POSIX_SOURCE
# endif
#endif
#include "simplethread.h"
#include "unicode/utypes.h"
#include "unicode/ustring.h"
#include "umutex.h"
#include "cmemory.h"
#include "cstring.h"
#include "uparse.h"
#include "unicode/resbund.h"
#include "unicode/udata.h"
#include "unicode/uloc.h"
#include "unicode/locid.h"
#include "putilimp.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h> // tolower, toupper
#if !defined(U_WINDOWS) && !defined(XP_MAC) && !defined(U_RHAPSODY)
#define POSIX 1
#endif
/* Needed by z/OS to get usleep */
#if defined(OS390)
#define __DOT1 1
#define __UU
#define _XOPEN_SOURCE_EXTENDED 1
#ifndef _XPG4_2
#define _XPG4_2
#endif
#include <unistd.h>
/*#include "platform_xopen_source_extended.h"*/
#endif
#if defined(POSIX) || defined(U_SOLARIS) || defined(U_AIX) || defined(U_HPUX)
#define HAVE_IMP
#if (ICU_USE_THREADS == 1)
#include <pthread.h>
#endif
#if defined(__hpux) && defined(HPUX_CMA)
# if defined(read) // read being defined as cma_read causes trouble with iostream::read
# undef read
# endif
#endif
/* Define __EXTENSIONS__ for Solaris and old friends in strict mode. */
#ifndef __EXTENSIONS__
#define __EXTENSIONS__
#endif
#if defined(OS390)
#include <sys/types.h>
#endif
#if !defined(OS390)
#include <signal.h>
#endif
/* Define _XPG4_2 for Solaris and friends. */
#ifndef _XPG4_2
#define _XPG4_2
#endif
/* Define __USE_XOPEN_EXTENDED for Linux and glibc. */
#ifndef __USE_XOPEN_EXTENDED
#define __USE_XOPEN_EXTENDED
#endif
/* Define _INCLUDE_XOPEN_SOURCE_EXTENDED for HP/UX (11?). */
#ifndef _INCLUDE_XOPEN_SOURCE_EXTENDED
#define _INCLUDE_XOPEN_SOURCE_EXTENDED
#endif
#include <unistd.h>
#endif
/* HPUX */
#ifdef sleep
#undef sleep
#endif
#if (ICU_USE_THREADS==0)
SimpleThread::SimpleThread()
{}
SimpleThread::~SimpleThread()
{}
int32_t
SimpleThread::start()
{ return -1; }
void
SimpleThread::run()
{}
void
SimpleThread::sleep(int32_t millis)
{}
UBool
SimpleThread::isRunning() {
return FALSE;
}
#else
#include "unicode/putil.h"
/* for mthreadtest*/
#include "unicode/numfmt.h"
#include "unicode/choicfmt.h"
#include "unicode/msgfmt.h"
#include "unicode/locid.h"
#include "unicode/ucol.h"
#include "unicode/calendar.h"
#include "ucaconf.h"
#ifdef U_WINDOWS
#define HAVE_IMP
# define VC_EXTRALEAN
# define WIN32_LEAN_AND_MEAN
# define NOUSER
# define NOSERVICE
# define NOIME
# define NOMCX
#include <windows.h>
#include <process.h>
//-----------------------------------------------------------------------------------
//
// class SimpleThread Windows Implementation
//
//-----------------------------------------------------------------------------------
struct Win32ThreadImplementation
{
HANDLE fHandle;
unsigned int fThreadID;
};
extern "C" unsigned int __stdcall SimpleThreadProc(void *arg)
{
((SimpleThread*)arg)->run();
return 0;
}
SimpleThread::SimpleThread()
:fImplementation(0)
{
Win32ThreadImplementation *imp = new Win32ThreadImplementation;
imp->fHandle = 0;
fImplementation = imp;
}
SimpleThread::~SimpleThread()
{
// Destructor. Because we start the thread running with _beginthreadex(),
// we own the Windows HANDLE for the thread and must
// close it here.
Win32ThreadImplementation *imp = (Win32ThreadImplementation*)fImplementation;
if (imp != 0) {
if (imp->fHandle != 0) {
CloseHandle(imp->fHandle);
imp->fHandle = 0;
}
}
delete (Win32ThreadImplementation*)fImplementation;
}
int32_t SimpleThread::start()
{
Win32ThreadImplementation *imp = (Win32ThreadImplementation*)fImplementation;
if(imp->fHandle != NULL) {
// The thread appears to have already been started.
// This is probably an error on the part of our caller.
return -1;
}
imp->fHandle = (HANDLE) _beginthreadex(
NULL, // Security
0x20000, // Stack Size
SimpleThreadProc, // Function to Run
(void *)this, // Arg List
0, // initflag. Start running, not suspended
&imp->fThreadID // thraddr
);
if (imp->fHandle == 0) {
// An error occured
int err = errno;
if (err == 0) {
err = -1;
}
return err;
}
return 0;
}
UBool SimpleThread::isRunning() {
//
// Test whether the thread associated with the SimpleThread object is
// still actually running.
//
// NOTE: on Win64 on Itanium processors, a crashes
// occur if the main thread of a process exits concurrently with some
// other thread(s) exiting. To avoid the possibility, we wait until the
// OS indicates that all threads have terminated, rather than waiting
// only until the end of the user's Run function has been reached.
//
// I don't know whether the crashes represent a Windows bug, or whether
// main() programs are supposed to have to wait for their threads.
//
Win32ThreadImplementation *imp = (Win32ThreadImplementation*)fImplementation;
bool success;
DWORD threadExitCode;
if (imp->fHandle == 0) {
// No handle, thread must not be running.
return FALSE;
}
success = GetExitCodeThread(imp->fHandle, &threadExitCode) != 0;
if (! success) {
// Can't get status, thread must not be running.
return FALSE;
}
return (threadExitCode == STILL_ACTIVE);
}
void SimpleThread::sleep(int32_t millis)
{
::Sleep(millis);
}
//-----------------------------------------------------------------------------------
//
// class SimpleThread NULL Implementation
//
//-----------------------------------------------------------------------------------
#elif defined XP_MAC
// since the Mac has no preemptive threading (at least on MacOS 8), only
// cooperative threading, threads are a no-op. We have no yield() calls
// anywhere in the ICU, so we are guaranteed to be thread-safe.
#define HAVE_IMP
SimpleThread::SimpleThread()
{}
SimpleThread::~SimpleThread()
{}
int32_t
SimpleThread::start()
{ return 0; }
void
SimpleThread::run()
{}
void
SimpleThread::sleep(int32_t millis)
{}
UBool
SimpleThread::isRunning() {
return FALSE;
}
#endif
//-----------------------------------------------------------------------------------
//
// class SimpleThread POSIX implementation
//
// A note on the POSIX vs the Windows implementations of this class..
// On Windows, the main thread must verify that other threads have finished
// before exiting, or crashes occasionally occur. (Seen on Itanium Win64 only)
// The function SimpleThread::isRunning() is used for this purpose.
//
// On POSIX, there is NO reliable non-blocking mechanism to determine
// whether a thread has exited. pthread_kill(thread, 0) almost works,
// but the system can recycle thread ids immediately, so seeing that a
// thread exists with this call could mean that the original thread has
// finished and a new one started with the same ID. Useless.
//
// So we need to do the check with user code, by setting a flag just before
// the thread function returns. A technique that is guaranteed to fail
// on Windows, because it indicates that the thread is done before all
// system level cleanup has happened.
//
//-----------------------------------------------------------------------------------
#if defined(POSIX)||defined(U_SOLARIS)||defined(U_AIX)||defined(U_HPUX)
#define HAVE_IMP
struct PosixThreadImplementation
{
pthread_t fThread;
UBool fRunning;
UBool fRan; // True if the thread was successfully started
};
extern "C" void* SimpleThreadProc(void *arg)
{
// This is the code that is run in the new separate thread.
SimpleThread *This = (SimpleThread *)arg;
This->run(); // Run the user code.
// The user function has returned. Set the flag indicating that this thread
// is done. Need a mutex for memory barrier purposes only, so that other thread
// will reliably see that the flag has changed.
PosixThreadImplementation *imp = (PosixThreadImplementation*)This->fImplementation;
umtx_lock(NULL);
imp->fRunning = FALSE;
umtx_unlock(NULL);
return 0;
}
SimpleThread::SimpleThread()
{
PosixThreadImplementation *imp = new PosixThreadImplementation;
imp->fRunning = FALSE;
imp->fRan = FALSE;
fImplementation = imp;
}
SimpleThread::~SimpleThread()
{
PosixThreadImplementation *imp = (PosixThreadImplementation*)fImplementation;
if (imp->fRan) {
pthread_join(imp->fThread, NULL);
}
delete imp;
fImplementation = (void *)0xdeadbeef;
}
int32_t SimpleThread::start()
{
int32_t rc;
static pthread_attr_t attr;
static UBool attrIsInitialized = FALSE;
PosixThreadImplementation *imp = (PosixThreadImplementation*)fImplementation;
imp->fRunning = TRUE;
imp->fRan = TRUE;
#ifdef HPUX_CMA
if (attrIsInitialized == FALSE) {
rc = pthread_attr_create(&attr);
attrIsInitialized = TRUE;
}
rc = pthread_create(&(imp->fThread),attr,&SimpleThreadProc,(void*)this);
#else
if (attrIsInitialized == FALSE) {
rc = pthread_attr_init(&attr);
#if defined(OS390)
{
int detachstate = 0; // jdc30: detach state of zero causes
//threads created with this attr to be in
//an undetached state. An undetached
//thread will keep its resources after
//termination.
pthread_attr_setdetachstate(&attr, &detachstate);
}
#else
// pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
#endif
attrIsInitialized = TRUE;
}
rc = pthread_create(&(imp->fThread),&attr,&SimpleThreadProc,(void*)this);
#endif
if (rc != 0) {
// some kind of error occured, the thread did not start.
imp->fRan = FALSE;
imp->fRunning = FALSE;
}
return rc;
}
UBool
SimpleThread::isRunning() {
// Note: Mutex functions are used here not for synchronization,
// but to force memory barriors to exist, to ensure that one thread
// can see changes made by another when running on processors
// with memory models having weak coherency.
PosixThreadImplementation *imp = (PosixThreadImplementation*)fImplementation;
umtx_lock(NULL);
UBool retVal = imp->fRunning;
umtx_unlock(NULL);
return retVal;
}
void SimpleThread::sleep(int32_t millis)
{
#ifdef U_SOLARIS
sigignore(SIGALRM);
#endif
#ifdef HPUX_CMA
cma_sleep(millis/100);
#elif defined(U_HPUX) || defined(OS390)
millis *= 1000;
while(millis >= 1000000) {
usleep(999999);
millis -= 1000000;
}
if(millis > 0) {
usleep(millis);
}
#else
usleep(millis * 1000);
#endif
}
#endif
// end POSIX
#ifndef HAVE_IMP
#error No implementation for threads! Cannot test.
0 = 216; //die
#endif
//-------------------------------------------------------------------------------------------
//
// class ThreadWithStatus - a thread that we can check the status and error condition of
//
//-------------------------------------------------------------------------------------------
class ThreadWithStatus : public SimpleThread
{
public:
UBool getError() { return (fErrors > 0); }
UBool getError(UnicodeString& fillinError) { fillinError = fErrorString; return (fErrors > 0); }
virtual ~ThreadWithStatus(){}
protected:
ThreadWithStatus() : fErrors(0) {}
void error(const UnicodeString &error) {
fErrors++; fErrorString = error;
SimpleThread::errorFunc();
}
void error() { error("An error occured."); }
private:
int32_t fErrors;
UnicodeString fErrorString;
};
#endif // ICU_USE_THREADS