// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/********************************************************************
 * COPYRIGHT: 
 * Copyright (c) 1999-2015, International Business Machines Corporation and
 * others. All Rights Reserved.
 ********************************************************************/

#if defined(hpux)
# ifndef _INCLUDE_POSIX_SOURCE
#  define _INCLUDE_POSIX_SOURCE
# endif
#endif

/* Define __EXTENSIONS__ for Solaris and old friends in strict mode. */
#ifndef __EXTENSIONS__
#define __EXTENSIONS__
#endif

// Defines _XOPEN_SOURCE for access to POSIX functions.
// Must be before any other #includes.
#include "uposixdefs.h"

#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 "intltest.h"

#include <stdio.h>
#include <string.h>
#include <ctype.h>    // tolower, toupper

#if U_PLATFORM_USES_ONLY_WIN32_API
    /* Prefer native Windows APIs even if POSIX is implemented (i.e., on Cygwin). */
#   undef POSIX
#elif U_PLATFORM_IMPLEMENTS_POSIX
#   define POSIX
#else
#   undef POSIX
#endif

/* Needed by z/OS to get usleep */
#if U_PLATFORM == U_PF_OS390
#define __DOT1 1
#ifndef __UU
#   define __UU
#endif
#ifndef _XPG4_2
#   define _XPG4_2
#endif
#include <unistd.h>
#endif

#if defined(POSIX)
#define HAVE_IMP

#include <pthread.h>

#if U_PLATFORM == U_PF_OS390
#include <sys/types.h>
#endif

#if U_PLATFORM != U_PF_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


#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"

#if U_PLATFORM_USES_ONLY_WIN32_API
#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;
}


void SimpleThread::join() {
    Win32ThreadImplementation *imp = (Win32ThreadImplementation*)fImplementation;
    if (imp->fHandle == 0) {
        // No handle, thread must not be running.
        return;
    }
    WaitForSingleObject(imp->fHandle, INFINITE);
}

#endif


//-----------------------------------------------------------------------------------
//
//   class SimpleThread   POSIX implementation
//
//-----------------------------------------------------------------------------------
#if defined(POSIX)
#define HAVE_IMP

struct PosixThreadImplementation
{
    pthread_t        fThread;
};

extern "C" void* SimpleThreadProc(void *arg)
{
    // This is the code that is run in the new separate thread.
    SimpleThread *This = (SimpleThread *)arg;
    This->run();
    return 0;
}

SimpleThread::SimpleThread() 
{
    PosixThreadImplementation *imp = new PosixThreadImplementation;
    fImplementation = imp;
}

SimpleThread::~SimpleThread()
{
    PosixThreadImplementation *imp = (PosixThreadImplementation*)fImplementation;
    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;

    if (attrIsInitialized == FALSE) {
        rc = pthread_attr_init(&attr);
#if U_PLATFORM == U_PF_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);
    
    if (rc != 0) {
        // some kind of error occured, the thread did not start.
    }

    return rc;
}

void SimpleThread::join() {
    PosixThreadImplementation *imp = (PosixThreadImplementation*)fImplementation;
    pthread_join(imp->fThread, NULL);
}

#endif
// end POSIX


#ifndef HAVE_IMP
#error  No implementation for threads! Cannot test.
#endif


class ThreadPoolThread: public SimpleThread {
  public:
    ThreadPoolThread(ThreadPoolBase *pool, int32_t threadNum) : fPool(pool), fNum(threadNum) {};
    virtual void run() {fPool->callFn(fNum); }
    ThreadPoolBase *fPool;
    int32_t         fNum;
};


ThreadPoolBase::ThreadPoolBase(IntlTest *test, int32_t howMany) :
        fIntlTest(test), fNumThreads(howMany), fThreads(NULL) {
    fThreads = new SimpleThread *[fNumThreads];
    if (fThreads == NULL) {
        fIntlTest->errln("%s:%d memory allocation failure.", __FILE__, __LINE__);
        return;
    }

    for (int i=0; i<fNumThreads; i++) {
        fThreads[i] = new ThreadPoolThread(this, i);
        if (fThreads[i] == NULL) {
            fIntlTest->errln("%s:%d memory allocation failure.", __FILE__, __LINE__);
        }
    }
}

void ThreadPoolBase::start() {
    for (int i=0; i<fNumThreads; i++) {
        if (fThreads && fThreads[i]) {
            fThreads[i]->start();
        }
    }
}

void ThreadPoolBase::join() {
    for (int i=0; i<fNumThreads; i++) {
        if (fThreads && fThreads[i]) {
            fThreads[i]->join();
        }
    }
}

ThreadPoolBase::~ThreadPoolBase() {
    if (fThreads) {
        for (int i=0; i<fNumThreads; i++) {
            delete fThreads[i];
            fThreads[i] = NULL;
        }
        delete[] fThreads;
        fThreads = NULL;
    }
}