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timers.h
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/* * ProFTPD - FTP server daemon * Copyright (c) 1997, 1998 Public Flood Software * Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net> * Copyright (c) 2001-2011 The ProFTPD Project team * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA. * * As a special exemption, Public Flood Software/MacGyver aka Habeeb J. Dihu * and other respective copyright holders give permission to link this program * with OpenSSL, and distribute the resulting executable, without including * the source code for OpenSSL in the source distribution. * * $Id: timers.h,v 1.18 2011/05/23 20:35:35 castaglia Exp $ */ #ifndef PR_TIMERS_H #define PR_TIMERS_H /* Schedule a timer for the given amount of seconds. The timerno argument * specifies a unique ID for the scheduled timer; passing -1 will have * a unique ID automatically assigned, and is generally recommended. * The module parameter identifies the module that owns the scheduled * timer. The callback_t parameter specifies a function to be called * when the timer expires. * * Return 0 if the timer was successfully created, or -1 if there was * an error. In the case of an error, errno will be set to an appropriate * reason. */ int pr_timer_add(int secs, int timerno, module *m, callback_t cb, const char *desc); /* Remove the timer indicated by the timerno parameter, and owned by the * given module. Note that if the caller does not know the module, * the value ANY_MODULE can be given. Return 0 on success, -1 on failure. * * If the timerno parameter is less than zero, then ALL timers associated * with the given module will be removed. The return value for this * situation will be the number of timers removed. These semantics can be * used when removing all timers for a module, e.g. when the module is * being unloaded. */ int pr_timer_remove(int timerno, module *m); /* Resets the scheduled timer, setting it back to its full scheduled * interval. If the caller does not know the owning module, the * value ANY_MODULE can be given. * * Returns 0 on success, -1 on failure. */ int pr_timer_reset(int timerno, module *m); /* This is a convenience function that can be used to "sleep" for the given * number of seconds. This function can be used instead of the sleep(3) * function, for it cannot be interrupted by signals or other timers. */ int pr_timer_sleep(int secs); /* This is a convenience function that can be used to "sleep" for the given * number of microseconds. This function can be used instead of the usleep(3) * function, for it cannot be interrupted by signals or other timers. */ int pr_timer_usleep(unsigned long usecs); /* For internal use only. */ void handle_alarm(void); void timers_init(void); #endif /* PR_TIMERS_H */