boinc/sched/sched_shmem.h

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software 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 Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// The structure of the memory segment shared between
// the feeder and schedulers
// This is essentially a cache of DB contents:
// small static tables like app_version,
// and a queue of results waiting to be sent.
#include "boinc_db.h"
// the following must be at least as large as DB tables
// (counting only non-deprecated entries for the current major version)
// Increase as needed
//
#define MAX_PLATFORMS 50
#define MAX_APPS 10
#define MAX_APP_VERSIONS 50
// If you increase this above 100,
// you may exceed the max shared-memory segment size
// on some operating systems.
#define MAX_WU_RESULTS 100
//#define MAX_WU_RESULTS 500
// values of WU_RESULT.state
#define WR_STATE_EMPTY 0
#define WR_STATE_PRESENT 1
// If neither of the above, the value is the PID of a scheduler process
// that has this item reserved
// a workunit/result pair
struct WU_RESULT {
int state;
int infeasible_count;
WORKUNIT workunit;
int resultid;
};
struct SCHED_SHMEM {
bool ready; // feeder sets to true when init done
// the following fields let the scheduler make sure
// that the shared mem has the right format
int ss_size; // sizeof(SCHED_SHMEM)
int platform_size; // sizeof(PLATFORM)
int app_size; // sizeof(APP)
int app_version_size; // sizeof(APP_VERSION)
int wu_result_size; // sizeof(WU_RESULT)
int nplatforms;
int napps;
int napp_versions;
int ncore_versions;
int nwu_results;
int max_platforms;
int max_apps;
int max_app_versions;
int max_core_versions;
int max_wu_results;
PLATFORM platforms[MAX_PLATFORMS];
APP apps[MAX_APPS];
APP_VERSION app_versions[MAX_APP_VERSIONS];
WU_RESULT wu_results[MAX_WU_RESULTS];
void init();
int verify();
int scan_tables();
bool have_app(int);
bool no_work(int pid);
void restore_work(int pid);
APP* lookup_app(int);
APP_VERSION* lookup_app_version(int appid, int platform, int version);
PLATFORM* lookup_platform(char*);
};