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#define _GNU_SOURCE
#include "pixie-threads.h"
#if defined(WIN32)
#include <Windows.h>
#include <process.h>
#endif
#if defined(__GNUC__)
#include <unistd.h>
#include <pthread.h>
#include <sched.h>
#include <errno.h>
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#ifndef UNUSEDPARM
#ifdef _MSC_VER
#define UNUSEDPARM(x) x
#else
#define UNUSEDPARM(x)
#endif
#endif
/****************************************************************************
****************************************************************************/
void
pixie_cpu_raise_priority(void)
{
#if defined WIN32
DWORD_PTR result;
result = SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
if (result == 0) {
fprintf(stderr, "set_priority: returned error win32:%u\n", (unsigned)GetLastError());
}
#elif defined(__linux__) && defined(__GNUC__)
pthread_t thread = pthread_self();
pthread_attr_t thAttr;
int policy = 0;
int max_prio_for_policy = 0;
pthread_attr_init(&thAttr);
pthread_attr_getschedpolicy(&thAttr, &policy);
max_prio_for_policy = sched_get_priority_max(policy);
pthread_setschedprio(thread, max_prio_for_policy);
pthread_attr_destroy(&thAttr);
return;
#endif
}
/****************************************************************************
* Set the current thread (implicit) to run exclusively on the explicit
* process.
* http://en.wikipedia.org/wiki/Processor_affinity
****************************************************************************/
void
pixie_cpu_set_affinity(unsigned processor)
{
#if defined WIN32
DWORD_PTR mask;
DWORD_PTR result;
if (processor > 0)
processor--;
mask = ((size_t)1)<<processor;
//printf("mask(%u) = 0x%08x\n", processor, mask);
result = SetThreadAffinityMask(GetCurrentThread(), mask);
if (result == 0) {
fprintf(stderr, "set_affinity: returned error win32:%u\n", (unsigned)GetLastError());
}
#elif defined(__linux__) && defined(__GNUC__)
int x;
pthread_t thread = pthread_self();
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(processor+1, &cpuset);
x = pthread_setaffinity_np(thread, sizeof(cpu_set_t), &cpuset);
if (x != 0) {
fprintf(stderr, "set_affinity: returned error linux:%d\n", errno);
}
#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
/* FIXME: add code here */
UNUSEDPARM(x);
#endif
}
/****************************************************************************
****************************************************************************/
unsigned
pixie_cpu_get_count(void)
{
#if defined WIN32
/* WINDOWS - use GetProcessAffinityMask() function */
size_t x;
#if defined _M_X64
DWORD_PTR process_mask = 0;
DWORD_PTR system_mask = 0;
#else
unsigned long process_mask = 0;
unsigned long system_mask = 0;
#endif
unsigned count = 0;
unsigned i;
x = GetProcessAffinityMask(GetCurrentProcess(), &process_mask, &system_mask);
if (x == 0) {
printf("GetProcessAffinityMask() returned error %u\n", (unsigned)GetLastError());
return 1;
}
for (i=0; i<32; i++) {
if (system_mask & 1)
count++;
system_mask >>= 1;
}
if (count == 0)
return 1;
else
return count;
#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
/* BSD - use sysctl() function */
int x;
int mib[2];
size_t ncpu_length;
int ncpu = 1;
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
ncpu_length = sizeof(ncpu);
x = sysctl(mib, 2, &ncpu, &ncpu_length, NULL, 0);
if (x == -1) {
perror("sysctl(HW_NCPU) failed");
return 1;
} else
return (unsigned)ncpu;
#elif defined linux
/* http://linux.die.net/man/2/sched_getaffinity */
{
pid_t pid;
cpu_set_t mask;
int err;
/* Gegret our process ID */
pid = getpid();
/* Get list of available CPUs for our system */
err = sched_getaffinity(pid, sizeof(mask), &mask);
if (err) {
perror("sched_getaffinity");
return 1;
} else {
#ifndef CPU_COUNT
return 1;
#else
return CPU_COUNT(&mask);
#endif
}
}
#elif defined(_SC_NPROCESSORS_ONLN)
/* Linux, Solaris, Mac OS>=10.4 */
return sysconf(_SC_NPROCESSORS_ONLN);
#elif defined(_SC_NPROC_ONLN)
/* Irix */
return sysconf(_SC_NPROC_ONLN);
#elif defined(MPC_GETNUMSPUS)
return mpctl(MPC_GETNUMSPUS, 0, 0);
#else
#error need to find CPU count
/* UNKNOWN - Well, we don't know the type of system which means we won't
* be able to start multiple threads anyway, so just return '1' */
return 1;
#endif
}
/****************************************************************************
****************************************************************************/
size_t
pixie_begin_thread(
void (*worker_thread)(void*),
unsigned flags,
void *worker_data)
{
#if defined(WIN32)
UNUSEDPARM(flags);
return _beginthread(worker_thread, 0, worker_data);
#else
typedef void *(*PTHREADFUNC)(void*);
pthread_t thread_id = 0;
pthread_create(
&thread_id,
NULL,
(PTHREADFUNC)worker_thread,
worker_data);
return (size_t)thread_id;
#endif
}
/****************************************************************************
****************************************************************************/
void pixie_thread_join(size_t thread_handle)
{
#if defined(WIN32)
WaitForSingleObject((HANDLE)thread_handle, INFINITE);
#else
void *p;
pthread_join((pthread_t)thread_handle, &p);
#endif
}
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