/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *     Copyright 2013 Couchbase, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

#ifndef LCB_PROCUTIL_H
#define LCB_PROCUTIL_H

#ifdef _WIN32
#include <windows.h>
#include <process.h>
#else
#include <sys/types.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

    typedef struct {
        /** Full command line to launch */
        const char *name;

        /** Name of file to which output should be redirected. Optional */
        const char *redirect;

        /** Whether this should be a foreground process (uses 'system') */
        int interactive;

        /** Exit status */
        int status;

        /** Whether the application exited*/
        int exited;

        /** PLATFORM-SPECIFIC */
#ifdef _WIN32
        STARTUPINFO si;
        PROCESS_INFORMATION pi;
#else
        pid_t pid;
#endif
    } child_process_t;


    /**
     * Create a new process.
     * Returns 0 on success and nonzero on failure.
     */
    int create_process(child_process_t *process);

    /**
     * Try to kill the process. If 'force' is specified, the process is killed
     * using more "forceful" action
     */
    void kill_process(child_process_t *process, int force);

    /**
     * Wait until a process has terminated.
     * If tmosec is negative, it polls without blocking,
     * if it is 0, it waits forever. If it is
     * positive, it will wait for that many seconds, polling intermittently.
     *
     * Returns 0 if the process exited. nonzero on timeout
     */
    int wait_process(child_process_t *process, int tmosec);

    /**
     * Cleans up any resources opened while creating the process.
     */
    void cleanup_process(child_process_t *process);

#ifdef __cplusplus
}
#endif

#endif