minetest/src/porting.cpp

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/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Random portability stuff
See comments in porting.h
*/
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#if defined(linux)
#include <unistd.h>
#elif defined(__APPLE__)
#include <unistd.h>
#include <mach-o/dyld.h>
#elif defined(__FreeBSD__)
#include <unistd.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#include "porting.h"
#include "config.h"
#include "debug.h"
#include "filesys.h"
#include "log.h"
#include "util/string.h"
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#include <list>
#ifdef __APPLE__
#include "CoreFoundation/CoreFoundation.h"
#endif
namespace porting
{
/*
Signal handler (grabs Ctrl-C on POSIX systems)
*/
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bool g_killed = false;
bool * signal_handler_killstatus(void)
{
return &g_killed;
}
#if !defined(_WIN32) // POSIX
#include <signal.h>
void sigint_handler(int sig)
{
if(g_killed == false)
{
dstream<<DTIME<<"INFO: sigint_handler(): "
<<"Ctrl-C pressed, shutting down."<<std::endl;
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// Comment out for less clutter when testing scripts
/*dstream<<DTIME<<"INFO: sigint_handler(): "
<<"Printing debug stacks"<<std::endl;
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debug_stacks_print();*/
g_killed = true;
}
else
{
(void)signal(SIGINT, SIG_DFL);
}
}
void signal_handler_init(void)
{
(void)signal(SIGINT, sigint_handler);
}
#else // _WIN32
#include <signal.h>
BOOL WINAPI event_handler(DWORD sig)
{
switch(sig)
{
case CTRL_C_EVENT:
case CTRL_CLOSE_EVENT:
case CTRL_LOGOFF_EVENT:
case CTRL_SHUTDOWN_EVENT:
if(g_killed == false)
{
dstream<<DTIME<<"INFO: event_handler(): "
<<"Ctrl+C, Close Event, Logoff Event or Shutdown Event, shutting down."<<std::endl;
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// Comment out for less clutter when testing scripts
/*dstream<<DTIME<<"INFO: event_handler(): "
<<"Printing debug stacks"<<std::endl;
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debug_stacks_print();*/
g_killed = true;
}
else
{
(void)signal(SIGINT, SIG_DFL);
}
break;
case CTRL_BREAK_EVENT:
break;
}
return TRUE;
}
void signal_handler_init(void)
{
SetConsoleCtrlHandler( (PHANDLER_ROUTINE)event_handler,TRUE);
}
#endif
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/*
Multithreading support
*/
int getNumberOfProcessors() {
#if defined(_SC_NPROCESSORS_ONLN)
return sysconf(_SC_NPROCESSORS_ONLN);
#elif defined(__FreeBSD__) || defined(__APPLE__)
unsigned int len, count;
len = sizeof(count);
return sysctlbyname("hw.ncpu", &count, &len, NULL, 0);
#elif defined(_GNU_SOURCE)
return get_nprocs();
#elif defined(_WIN32)
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
return sysinfo.dwNumberOfProcessors;
#elif defined(PTW32_VERSION) || defined(__hpux)
return pthread_num_processors_np();
#else
return 1;
#endif
}
/*
Path mangler
*/
// Default to RUN_IN_PLACE style relative paths
std::string path_share = "..";
std::string path_user = "..";
std::string getDataPath(const char *subpath)
{
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return path_share + DIR_DELIM + subpath;
}
void pathRemoveFile(char *path, char delim)
{
// Remove filename and path delimiter
int i;
for(i = strlen(path)-1; i>=0; i--)
{
if(path[i] == delim)
break;
}
path[i] = 0;
}
bool detectMSVCBuildDir(char *c_path)
{
std::string path(c_path);
const char *ends[] = {"bin\\Release", "bin\\Build", NULL};
return (removeStringEnd(path, ends) != "");
}
void initializePaths()
{
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#if RUN_IN_PLACE
/*
Use relative paths if RUN_IN_PLACE
*/
infostream<<"Using relative paths (RUN_IN_PLACE)"<<std::endl;
/*
Windows
*/
#if defined(_WIN32)
const DWORD buflen = 1000;
char buf[buflen];
DWORD len;
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// Find path of executable and set path_share relative to it
len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
assert(len < buflen);
pathRemoveFile(buf, '\\');
if(detectMSVCBuildDir(buf)){
infostream<<"MSVC build directory detected"<<std::endl;
path_share = std::string(buf) + "\\..\\..";
path_user = std::string(buf) + "\\..\\..";
}
else{
path_share = std::string(buf) + "\\..";
path_user = std::string(buf) + "\\..";
}
/*
Linux
*/
#elif defined(linux)
char buf[BUFSIZ];
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memset(buf, 0, BUFSIZ);
// Get path to executable
assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
pathRemoveFile(buf, '/');
path_share = std::string(buf) + "/..";
path_user = std::string(buf) + "/..";
/*
OS X
*/
#elif defined(__APPLE__)
//https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/dyld.3.html
//TODO: Test this code
char buf[BUFSIZ];
uint32_t len = sizeof(buf);
assert(_NSGetExecutablePath(buf, &len) != -1);
pathRemoveFile(buf, '/');
path_share = std::string(buf) + "/..";
path_user = std::string(buf) + "/..";
/*
FreeBSD
*/
#elif defined(__FreeBSD__)
int mib[4];
char buf[BUFSIZ];
size_t len = sizeof(buf);
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PATHNAME;
mib[3] = -1;
assert(sysctl(mib, 4, buf, &len, NULL, 0) != -1);
pathRemoveFile(buf, '/');
path_share = std::string(buf) + "/..";
path_user = std::string(buf) + "/..";
#else
//TODO: Get path of executable. This assumes working directory is bin/
dstream<<"WARNING: Relative path not properly supported on this platform"
<<std::endl;
path_share = std::string("..");
path_user = std::string("..");
#endif
#else // RUN_IN_PLACE
/*
Use platform-specific paths otherwise
*/
infostream<<"Using system-wide paths (NOT RUN_IN_PLACE)"<<std::endl;
/*
Windows
*/
#if defined(_WIN32)
const DWORD buflen = 1000;
char buf[buflen];
DWORD len;
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// Find path of executable and set path_share relative to it
len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
assert(len < buflen);
pathRemoveFile(buf, '\\');
// Use ".\bin\.."
path_share = std::string(buf) + "\\..";
// Use "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
len = GetEnvironmentVariable("APPDATA", buf, buflen);
assert(len < buflen);
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path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME;
/*
Linux
*/
#elif defined(linux)
// Get path to executable
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std::string bindir = "";
{
char buf[BUFSIZ];
memset(buf, 0, BUFSIZ);
assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
pathRemoveFile(buf, '/');
bindir = buf;
}
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// Find share directory from these.
// It is identified by containing the subdirectory "builtin".
std::list<std::string> trylist;
std::string static_sharedir = STATIC_SHAREDIR;
if(static_sharedir != "" && static_sharedir != ".")
trylist.push_back(static_sharedir);
trylist.push_back(bindir + "/../share/" + PROJECT_NAME);
trylist.push_back(bindir + "/..");
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for(std::list<std::string>::const_iterator i = trylist.begin();
i != trylist.end(); i++)
{
const std::string &trypath = *i;
if(!fs::PathExists(trypath) || !fs::PathExists(trypath + "/builtin")){
dstream<<"WARNING: system-wide share not found at \""
<<trypath<<"\""<<std::endl;
continue;
}
// Warn if was not the first alternative
if(i != trylist.begin()){
dstream<<"WARNING: system-wide share found at \""
<<trypath<<"\""<<std::endl;
}
path_share = trypath;
break;
}
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path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
/*
OS X
*/
#elif defined(__APPLE__)
// Code based on
// http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
CFBundleRef main_bundle = CFBundleGetMainBundle();
CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
char path[PATH_MAX];
if(CFURLGetFileSystemRepresentation(resources_url, TRUE, (UInt8 *)path, PATH_MAX))
{
dstream<<"Bundle resource path: "<<path<<std::endl;
//chdir(path);
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path_share = std::string(path) + "/share";
}
else
{
// error!
dstream<<"WARNING: Could not determine bundle resource path"<<std::endl;
}
CFRelease(resources_url);
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path_user = std::string(getenv("HOME")) + "/Library/Application Support/" + PROJECT_NAME;
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#elif defined(__FreeBSD__)
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path_share = STATIC_SHAREDIR;
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path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
#endif
#endif // RUN_IN_PLACE
}
} //namespace porting