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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Core/precomp.h"
#include <libgen.h>
#include <unistd.h>
#include <dlfcn.h>
#include <errno.h>
#include <dirent.h>
#include <signal.h>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "implementation.h"
#include "init_linux.h"
// note: this cannot be replaced by <ctime>! (timeval needs to be defined)
#include <sys/time.h>
#include <sys/stat.h>
#if defined(HAVE_SYS_SYSCTL_H) && \
!defined(_SC_NPROCESSORS_ONLN) && !defined(_SC_NPROC_ONLN)
#include <sys/param.h>
#include <sys/sysctl.h>
#endif
#include "API/Core/System/setupcore.h"
#include "API/Core/System/system.h"
#ifdef __APPLE__
#include <CoreFoundation/CoreFoundation.h>
#endif
static int init_ref_count = 0;
long _begin_time;
void init_system()
{
init_ref_count++;
if (init_ref_count > 1) return;
timeval tv;
gettimeofday(&tv, NULL);
_begin_time = (long) tv.tv_sec*(long) 1000+(long) tv.tv_usec/(long) 1000;
#ifdef NDEBUG
signal(SIGSEGV, deinit);
#endif
}
void deinit_system()
{
init_ref_count--;
if (init_ref_count > 0) return;
#ifdef NDEBUG
signal(SIGSEGV,SIG_DFL); //restore default behavior
#endif
}
unsigned int CL_System::sys_time()
{
timeval tv;
gettimeofday(&tv, NULL);
return (long) tv.tv_sec*(long) 1000 + (long) tv.tv_usec/(long) 1000 - _begin_time;
}
void CL_System::sleep(int millis)
{
timeval tv;
tv.tv_sec = millis/1000;
tv.tv_usec = (millis%1000)*1000;
select(0, 0, 0, 0, &tv);
}
int CL_System::get_num_cores() {
long cpus = -1;
# if defined(_SC_NPROCESSORS_ONLN)
cpus = sysconf(_SC_NPROCESSORS_ONLN);
# elif defined(_SC_NPROC_ONLN)
cpus = sysconf(_SC_NPROC_ONLN);
# elif defined(HAVE_SYS_SYSCTL_H)
int mib[2];
size_t len;
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
len = sizeof(cpus);
(void)sysctl(mib, 2, &cpus, &len, NULL, 0);
# endif
return (cpus < 1)?-1 : static_cast<int>(cpus);
}
std::string CL_System::get_exe_path()
{
char exe_file[PATH_MAX + 1];
#ifdef __APPLE__
CFBundleRef mainBundle = CFBundleGetMainBundle();
if (mainBundle)
{
CFURLRef mainURL = CFBundleCopyBundleURL(mainBundle);
if (mainURL)
{
int ok = CFURLGetFileSystemRepresentation (
mainURL, (Boolean) true, (UInt8*)exe_file, PATH_MAX
);
if (ok)
{
return std::string(exe_file) + "/";
}
}
}
throw CL_Error("get_exe_path failed");
#else
#ifndef PROC_EXE_PATH
#define PROC_EXE_PATH "/proc/self/exe"
#endif
int size;
struct stat sb;
if (lstat(PROC_EXE_PATH, &sb) < 0)
{
#ifdef EXTERN___PROGNAME
extern const char *__progname;
char *pathenv, *name, *end;
char fname[PATH_MAX];
char cwd[PATH_MAX];
struct stat sba;
exe_file[0] = '\0';
if ((pathenv = getenv("PATH")) != NULL)
{
for (name = pathenv; name; name = end)
{
if ((end = strchr(name, ':')))
*end++ = '\0';
snprintf(fname, sizeof(fname),
"%s/%s", name, (char *)__progname);
if (stat(fname, &sba) == 0) {
snprintf(exe_file, sizeof(exe_file),
"%s/", name);
break;
}
}
}
// if getenv failed or path still not found
// try current directory as last resort
if (!exe_file[0])
{
if (getcwd(cwd, sizeof(cwd)) != NULL)
{
snprintf(fname, sizeof(fname),
"%s/%s", cwd, (char *)__progname);
if (stat(fname, &sba) == 0)
snprintf(exe_file, sizeof(exe_file),
"%s/", cwd);
}
}
if (!exe_file[0])
throw CL_Error("get_exe_path: could not find path");
else
return std::string(exe_file);
#else
throw CL_Error("get_exe_path: proc file system not accesible");
#endif
}
else
{
size = readlink(PROC_EXE_PATH, exe_file, PATH_MAX);
if (size < 0)
{
throw CL_Error(strerror(errno));
}
else
{
exe_file[size] = '\0';
return std::string(dirname(exe_file)) + "/";
}
}
#endif
}
/* EOF */
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