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-rw-r--r--gruel/src/lib/realtime.cc178
1 files changed, 0 insertions, 178 deletions
diff --git a/gruel/src/lib/realtime.cc b/gruel/src/lib/realtime.cc
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--- a/gruel/src/lib/realtime.cc
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-/* -*- c++ -*- */
-/*
- * Copyright 2006,2007,2008 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio 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 3, or (at your option)
- * any later version.
- *
- * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <gruel/realtime.h>
-
-#ifdef HAVE_SCHED_H
-#include <sched.h>
-#endif
-
-#include <algorithm>
-#include <math.h>
-#include <string.h>
-#include <errno.h>
-#include <stdio.h>
-
-#if defined(HAVE_PTHREAD_SETSCHEDPARAM) || defined(HAVE_SCHED_SETSCHEDULER)
-#include <pthread.h>
-
-namespace gruel {
-
- /*!
- * Rescale our virtual priority so that it maps to the middle 1/2 of
- * the priorities given by min_real_pri and max_real_pri.
- */
- static int
- rescale_virtual_pri(int virtual_pri, int min_real_pri, int max_real_pri)
- {
- float rmin = min_real_pri + (0.25 * (max_real_pri - min_real_pri));
- float rmax = min_real_pri + (0.75 * (max_real_pri - min_real_pri));
- float m = (rmax - rmin) / (rt_priority_max() - rt_priority_min());
- float y = m * (virtual_pri - rt_priority_min()) + rmin;
- int y_int = static_cast<int>(rint(y));
- return std::max(min_real_pri, std::min(max_real_pri, y_int));
- }
-
-} // namespace gruel
-
-#endif
-
-
-#if defined(HAVE_PTHREAD_SETSCHEDPARAM)
-
-namespace gruel {
-
- rt_status_t
- enable_realtime_scheduling(rt_sched_param p)
- {
- int policy = p.policy == RT_SCHED_FIFO ? SCHED_FIFO : SCHED_RR;
- int min_real_pri = sched_get_priority_min(policy);
- int max_real_pri = sched_get_priority_max(policy);
- int pri = rescale_virtual_pri(p.priority, min_real_pri, max_real_pri);
-
- // FIXME check hard and soft limits with getrlimit, and limit the value we ask for.
- // fprintf(stderr, "pthread_setschedparam: policy = %d, pri = %d\n", policy, pri);
-
- struct sched_param param;
- memset (&param, 0, sizeof (param));
- param.sched_priority = pri;
- int result = pthread_setschedparam (pthread_self(), policy, &param);
- if (result != 0) {
- if (result == EPERM) // N.B., return value, not errno
- return RT_NO_PRIVS;
- else {
- fprintf(stderr,
- "pthread_setschedparam: failed to set real time priority: %s\n",
- strerror(result));
- return RT_OTHER_ERROR;
- }
- }
-
- //printf("SCHED_FIFO enabled with priority = %d\n", pri);
- return RT_OK;
- }
-} // namespace gruel
-
-
-#elif defined(HAVE_SCHED_SETSCHEDULER)
-
-namespace gruel {
-
- rt_status_t
- enable_realtime_scheduling(rt_sched_param p)
- {
- int policy = p.policy == RT_SCHED_FIFO ? SCHED_FIFO : SCHED_RR;
- int min_real_pri = sched_get_priority_min(policy);
- int max_real_pri = sched_get_priority_max(policy);
- int pri = rescale_virtual_pri(p.priority, min_real_pri, max_real_pri);
-
- // FIXME check hard and soft limits with getrlimit, and limit the value we ask for.
- // fprintf(stderr, "sched_setscheduler: policy = %d, pri = %d\n", policy, pri);
-
- int pid = 0; // this process
- struct sched_param param;
- memset(&param, 0, sizeof(param));
- param.sched_priority = pri;
- int result = sched_setscheduler(pid, policy, &param);
- if (result != 0){
- if (errno == EPERM)
- return RT_NO_PRIVS;
- else {
- perror ("sched_setscheduler: failed to set real time priority");
- return RT_OTHER_ERROR;
- }
- }
-
- //printf("SCHED_FIFO enabled with priority = %d\n", pri);
- return RT_OK;
- }
-
-} // namespace gruel
-
-#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
-
-#include <windows.h>
-
-namespace gruel {
-
- rt_status_t enable_realtime_scheduling(rt_sched_param p){
-
- //set the priority class on the process
- int pri_class = (true)? REALTIME_PRIORITY_CLASS : NORMAL_PRIORITY_CLASS;
- if (SetPriorityClass(GetCurrentProcess(), pri_class) == 0)
- return RT_OTHER_ERROR;
-
- //scale the priority value to the constants
- int priorities[] = {
- THREAD_PRIORITY_IDLE, THREAD_PRIORITY_LOWEST, THREAD_PRIORITY_BELOW_NORMAL, THREAD_PRIORITY_NORMAL,
- THREAD_PRIORITY_ABOVE_NORMAL, THREAD_PRIORITY_HIGHEST, THREAD_PRIORITY_TIME_CRITICAL
- };
- const double priority = double(p.priority)/(rt_priority_max() - rt_priority_min());
- size_t pri_index = size_t((priority+1.0)*6/2.0); // -1 -> 0, +1 -> 6
- pri_index %= sizeof(priorities)/sizeof(*priorities); //range check
-
- //set the thread priority on the thread
- if (SetThreadPriority(GetCurrentThread(), priorities[pri_index]) == 0)
- return RT_OTHER_ERROR;
-
- //printf("SetPriorityClass + SetThreadPriority\n");
- return RT_OK;
- }
-
-} // namespace gruel
-
-#else
-
-namespace gruel {
-
- rt_status_t
- enable_realtime_scheduling(rt_sched_param p)
- {
- return RT_NOT_IMPLEMENTED;
- }
-} // namespace gruel
-
-#endif