/*
    Copyright 2005-2010 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

#include "rml_omp.h"
#define HARNESS_DEFAULT_MIN_THREADS 0
#include "test_server.h"
#include "tbb/tbb_misc.h"

typedef __kmp::rml::omp_server MyServer;
typedef __kmp::rml::omp_factory MyFactory;

static bool StrictTeam;

class MyTeam {
    MyTeam& operator=( const MyTeam& ) ;
public:
    struct info_type {
        rml::job* job;
        bool ran;
        info_type() : job(NULL), ran(false) {}
    };
    MyTeam( MyServer& /* server */, size_t max_thread_ ) :
        max_thread(max_thread_)
    {
        self_ptr = this;
        info = new info_type[max_thread];
    }
    ~MyTeam() {
        delete[] info;
    }
    const size_t max_thread;
    size_t n_thread;
    tbb::atomic<int> barrier;
    /** Indexed with 1-origin index */
    info_type* info;
    int iteration;
    MyTeam* self_ptr;
};

class MyClient: public ClientBase<__kmp::rml::omp_client> {
public:
    MyServer* server;
    /*override*/void process( job& j, void* cookie, size_type index ) {
        MyTeam& t = *static_cast<MyTeam*>(cookie);
        ASSERT( t.self_ptr==&t, "trashed cookie" ); 
        ASSERT( index<t.max_thread, NULL ); 
        ASSERT( !t.info[index].ran, "duplicate index?" ); 
        t.info[index].job = &j;
        t.info[index].ran = true;
        do_process(j);
        if( index==1 && nesting.level<nesting.limit ) {
            DoOneConnection<MyFactory,MyClient> doc(MaxThread,Nesting(nesting.level+1,nesting.limit),0,false);
            doc(0);
        }
#if _WIN32||_WIN64
        // test activate/deactivate
        if( t.n_thread>1 && t.n_thread%2==0 ) {
            if( nesting.level==0 ) {
                if( index&1 ) {
                    size_type target = index-1;
                    ASSERT(  target<t.max_thread, NULL ); 
                    // wait until t.info[target].job is defined
                    tbb::internal::spin_wait_until_eq( t.info[target].ran, true );
                    server->try_increase_load( 1, true );
                    server->reactivate( t.info[target].job );
                } else {
                    server->deactivate( &j );
                }
            }
        }
#endif /* _WIN32||_WIN64 */
        ++t.barrier;
    }
    static const bool is_omp = true;
    bool is_strict() const {return StrictTeam;}
};

void FireUpJobs( MyServer& server, MyClient& client, int max_thread, int n_extra, Checker* checker ) {
    ASSERT( max_thread>=0, NULL );
#if _WIN32||_WIN64
    ::rml::server::execution_resource_t me;
    server.register_master( me );
#endif /* _WIN32||_WIN64 */
    client.server = &server;
    MyTeam team(server,size_t(max_thread));
    MyServer::size_type n_thread = 0;
    for( int iteration=0; iteration<4; ++iteration ) {
        for( size_t i=0; i<team.max_thread; ++i )
            team.info[i].ran = false;
        switch( iteration ) {
            default:
                n_thread = int(max_thread);
                break;
            case 1:
                // No change in number of threads
                break;
            case 2:
                // Decrease number of threads.  
                n_thread = int(max_thread)/2;
                break;
            // Case 3 is same code as the default, but has effect of increasing the number of threads.
        }
        team.barrier = 0;
        REMARK("client %d: server.run with n_thread=%d\n", client.client_id(), int(n_thread) );
        server.independent_thread_number_changed( n_extra );
        if( checker ) {
            // Give RML time to respond to change in number of threads.
            MilliSleep(1);
        }
        int n_delivered = server.try_increase_load( n_thread, StrictTeam );
        ASSERT( !StrictTeam || n_delivered==int(n_thread), "server failed to satisfy strict request" );
        if( n_delivered<0 ) {
            REMARK( "client %d: oversubscription occurred (by %d)\n", client.client_id(), -n_delivered );
            server.independent_thread_number_changed( -n_extra );
            n_delivered = 0;
        } else {
            team.n_thread = n_delivered;
            ::rml::job* job_array[JobArraySize];
            job_array[n_delivered] = (::rml::job*)intptr_t(-1);
            server.get_threads( n_delivered, &team, job_array );
            __TBB_ASSERT( job_array[n_delivered]== (::rml::job*)intptr_t(-1), NULL );
            for( int i=0; i<n_delivered; ++i ) {
                MyJob* j = static_cast<MyJob*>(job_array[i]);
                int s = j->state;
                ASSERT( s==MyJob::idle||s==MyJob::busy, NULL );
            }
            server.independent_thread_number_changed( -n_extra );
            REMARK("client %d: team size is %d\n", client.client_id(), n_delivered);
            if( checker ) {
                checker->check_number_of_threads_delivered( n_delivered, n_thread, n_extra );
            }      
            // Protocol requires that master wait until workers have called "done_processing"
            while( team.barrier!=n_delivered ) {
                ASSERT( team.barrier>=0, NULL );
                ASSERT( team.barrier<=n_delivered, NULL );
                __TBB_Yield();
            }
            REMARK("client %d: team completed\n", client.client_id() );
            for( int i=0; i<n_delivered; ++i ) {
                ASSERT( team.info[i].ran, "thread on team allegedly delivered, but did not run?" );
            }
        }
        for( MyServer::size_type i=n_delivered; i<MyServer::size_type(max_thread); ++i ) {
            ASSERT( !team.info[i].ran, "thread on team ran with illegal index" );
        }
    }
#if _WIN32||_WIN64
    server.unregister_master( me );
#endif
}

void DoClientSpecificVerification( MyServer& server, int /*n_thread*/ )
{
    ASSERT( server.current_balance()==int(tbb::internal::DetectNumberOfWorkers())-1, NULL );
}

int TestMain () {
    StrictTeam = true;
    VerifyInitialization<MyFactory,MyClient>( MaxThread );
    SimpleTest<MyFactory,MyClient>();

    StrictTeam = false;
    VerifyInitialization<MyFactory,MyClient>( MaxThread );
    SimpleTest<MyFactory,MyClient>();

    return Harness::Done;
}