/** @file * IPRT - Process Management. */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ #ifndef ___iprt_process_h #define ___iprt_process_h #include #include __BEGIN_DECLS /** @defgroup grp_rt_process RTProc - Process Management * @ingroup grp_rt * @{ */ /** * Process priority. * * The process priority is used to select how scheduling properties * are assigned to the different thread types (see THREADTYPE). * * In addition to using the policy assigned to the process at startup (DEFAULT) * it is possible to change the process priority at runtime. This allows for * a GUI, resource manager or admin to adjust the general priorty of a task * without upsetting the fine-tuned priority of the threads within. */ typedef enum RTPROCPRIORITY { /** Invalid priority. */ RTPROCPRIORITY_INVALID = 0, /** Default priority. * Derive the schedulding policy from the priority of the RTR3Init() * and RTProcSetPriority() callers and the rights the process have * to alter its own priority. */ RTPROCPRIORITY_DEFAULT, /** Flat priority. * Assumes a scheduling policy which puts the process at the default priority * and with all thread at the same priority. */ RTPROCPRIORITY_FLAT, /** Low priority. * Assumes a scheduling policy which puts the process mostly below the * default priority of the host OS. */ RTPROCPRIORITY_LOW, /** Normal priority. * Assume a scheduling policy which shares the cpu resources fairly with * other processes running with the default priority of the host OS. */ RTPROCPRIORITY_NORMAL, /** High priority. * Assumes a scheduling policy which puts the task above the default * priority of the host OS. This policy might easily cause other tasks * in the system to starve. */ RTPROCPRIORITY_HIGH, /** Last priority, used for validation. */ RTPROCPRIORITY_LAST } RTPROCPRIORITY; /** * Get the current process identifier. * * @returns Process identifier. */ RTDECL(RTPROCESS) RTProcSelf(void); #ifdef IN_RING0 /** * Get the current process handle. * * @returns Ring-0 process handle. */ RTR0DECL(RTR0PROCESS) RTR0ProcHandleSelf(void); #endif #ifdef IN_RING3 /** * Attempts to alter the priority of the current process. * * @returns iprt status code. * @param enmPriority The new priority. */ RTR3DECL(int) RTProcSetPriority(RTPROCPRIORITY enmPriority); /** * Gets the current priority of this process. * * @returns The priority (see RTPROCPRIORITY). */ RTR3DECL(RTPROCPRIORITY) RTProcGetPriority(void); /** * Create a child process. * * @returns iprt status code. * @param pszExec Executable image to use to create the child process. * @param papszArgs Pointer to an array of arguments to the child. The array terminated by an entry containing NULL. * @param Env Handle to the environment block for the child. * @param fFlags Flags. This is currently reserved and must be 0. * @param pProcess Where to store the process identifier on successful return. * The content is not changed on failure. NULL is allowed. */ RTR3DECL(int) RTProcCreate(const char *pszExec, const char * const *papszArgs, RTENV Env, unsigned fFlags, PRTPROCESS pProcess); /** * Process exit reason. */ typedef enum RTPROCEXITREASON { /** Normal exit. iStatus contains the exit code. */ RTPROCEXITREASON_NORMAL = 1, /** Any abnormal exit. iStatus is undefined. */ RTPROCEXITREASON_ABEND, /** Killed by a signal. The iStatus field contains the signal number. */ RTPROCEXITREASON_SIGNAL } RTPROCEXITREASON; /** * Process exit status. */ typedef struct RTPROCSTATUS { /** The process exit status if the exit was a normal one. */ int iStatus; /** The reason the process terminated. */ RTPROCEXITREASON enmReason; } RTPROCSTATUS; /** Pointer to a process exit status structure. */ typedef RTPROCSTATUS *PRTPROCSTATUS; /** Pointer to a const process exit status structure. */ typedef const RTPROCSTATUS *PCRTPROCSTATUS; /** Flags for RTProcWait(). * @{ */ /** Block indefinitly waiting for the process to exit. */ #define RTPROCWAIT_FLAGS_BLOCK 0 /** Don't block, just check if the process have exitted. */ #define RTPROCWAIT_FLAGS_NOBLOCK 1 /** @} */ /** * Waits for a process, resumes on interruption. * * @returns VINF_SUCCESS when the status code for the process was collected and put in *pProcStatus. * @returns VERR_PROCESS_NOT_FOUND if the specified process wasn't found. * @returns VERR_PROCESS_RUNNING when the RTPROCWAIT_FLAG_NOBLOCK and the process haven't exitted yet. * * @param Process The process to wait for. * @param fFlags The wait flags, any of the RTPROCWAIT_FLAGS_ \#defines. * @param pProcStatus Where to store the exit status on success. */ RTR3DECL(int) RTProcWait(RTPROCESS Process, unsigned fFlags, PRTPROCSTATUS pProcStatus); /** * Waits for a process, returns on interruption. * * @returns VINF_SUCCESS when the status code for the process was collected and put in *pProcStatus. * @returns VERR_PROCESS_NOT_FOUND if the specified process wasn't found. * @returns VERR_PROCESS_RUNNING when the RTPROCWAIT_FLAG_NOBLOCK and the process haven't exitted yet. * @returns VERR_INTERRUPTED when the wait was interrupted by the arrival of a signal or other async event. * * @param Process The process to wait for. * @param fFlags The wait flags, any of the RTPROCWAIT_FLAGS_ \#defines. * @param pProcStatus Where to store the exit status on success. */ RTR3DECL(int) RTProcWaitNoResume(RTPROCESS Process, unsigned fFlags, PRTPROCSTATUS pProcStatus); /** * Terminates (kills) a running process. * * @returns IPRT status code. * @param Process The process to terminate. */ RTR3DECL(int) RTProcTerminate(RTPROCESS Process); /** * Gets the processor affinity mask of the current process. * * @returns The affinity mask. */ RTR3DECL(uint64_t) RTProcGetAffinityMask(void); /** * Gets the executable image name of the current process. * * * @returns pszExecName on success. NULL on buffer overflow or other errors. * * @param pszExecName Where to store the name. * @param cchExecName The size of the buffer. */ RTR3DECL(char *) RTProcGetExecutableName(char *pszExecName, size_t cchExecName); /** * Daemonize the current process, making it a background process. The current * process will exit if daemonizing is successful. * * @returns iprt status code. * @param fNoChDir Pass false to change working directory to "/". * @param fNoClose Pass false to redirect standard file streams to the null device. * @param pszPidfile Path to a file to write the process id of the daemon * process to. Daemonizing will fail if this file already * exists or cannot be written. May be NULL. */ RTR3DECL(int) RTProcDaemonize(bool fNoChDir, bool fNoClose, const char *pszPidfile); #endif /* IN_RING3 */ /** @} */ __END_DECLS #endif