node/src/platform_win32.cc at pathfix · wave2future/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include <node.h>

#include "platform.h"

#include <v8.h>

#include <errno.h>

#include <stdlib.h>

#if defined(__MINGW32__)

#include <sys/param.h> // for MAXPATHLEN

#include <unistd.h> // getpagesize

#endif

#include <platform_win32.h>

#include <psapi.h>

namespace node {

using namespace v8;

static char *process_title = NULL;

double Platform::prog_start_time = 0.0;

// Does the about the same as strerror(),

// but supports all windows errror messages

const char *winapi_strerror(const int errorno) {

char *errmsg = NULL;

FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |

FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);

if (errmsg) {

// Remove trailing newlines

for (int i = strlen(errmsg) - 1;

i >= 0 && (errmsg[i] == '\n' || errmsg[i] == '\r'); i--) {

errmsg[i] = '\0';

}

return errmsg;

} else {

// FormatMessage failed

return "Unknown error";

}

// Does the about the same as perror(), but for windows api functions

void winapi_perror(const char* prefix = NULL) {

DWORD errorno = GetLastError();

const char *errmsg = NULL;

FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |

FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorno,

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);

if (!errmsg) {

errmsg = "Unknown error\n";

}

// FormatMessage messages include a newline character

if (prefix) {

fprintf(stderr, "%s: %s", prefix, errmsg);

} else {

fputs(errmsg, stderr);

}

char** Platform::SetupArgs(int argc, char *argv[]) {

return argv;

}

// Max title length; the only thing MSDN tells us about the maximum length

// of the console title is that it is smaller than 64K. However in practice

// it is much smaller, and there is no way to figure out what the exact length

// of the title is or can be, at least not on XP. To make it even more

// annoying, GetConsoleTitle failes when the buffer to be read into is bigger

// than the actual maximum length. So we make a conservative guess here;

// just don't put the novel you're writing in the title, unless the plot

// survives truncation.

#define MAX_TITLE_LENGTH 8192

void Platform::SetProcessTitle(char *title) {

// We need to convert _title_ to UTF-16 first, because that's what windows uses internally.

// It would be more efficient to use the UTF-16 value that we can obtain from v8,

// but it's not accessible from here.

int length;

WCHAR *title_w;

// Find out how big the buffer for the wide-char title must be

length = MultiByteToWideChar(CP_UTF8, 0, title, -1, NULL, 0);

if (!length) {

winapi_perror("MultiByteToWideChar");

return;

}

// Convert to wide-char string

title_w = new WCHAR[length];

length = MultiByteToWideChar(CP_UTF8, 0, title, -1, title_w, length);

if (!length) {

winapi_perror("MultiByteToWideChar");

delete title_w;

return;

};

// If the title must be truncated insert a \0 terminator there

if (length > MAX_TITLE_LENGTH) {

title_w[MAX_TITLE_LENGTH - 1] = *L"\0";

}

if (!SetConsoleTitleW(title_w)) {

winapi_perror("SetConsoleTitleW");

}

free(process_title);

process_title = strdup(title);

delete title_w;

}

static inline char* _getProcessTitle() {

WCHAR title_w[MAX_TITLE_LENGTH];

char *title;

int result, length;

result = GetConsoleTitleW(title_w, sizeof(title_w) / sizeof(WCHAR));

if (result == 0) {

winapi_perror("GetConsoleTitleW");

return NULL;

}

// Find out what the size of the buffer is that we need

length = WideCharToMultiByte(CP_UTF8, 0, title_w, -1, NULL, 0, NULL, NULL);

if (!length) {

winapi_perror("WideCharToMultiByte");

return NULL;

}

title = (char *) malloc(length);

if (!title) {

perror("malloc");

return NULL;

}

// Do utf16 -> utf8 conversion here

if (!WideCharToMultiByte(CP_UTF8, 0, title_w, -1, title, length, NULL, NULL)) {

winapi_perror("WideCharToMultiByte");

free(title);

return NULL;

}

return title;

}

const char* Platform::GetProcessTitle(int *len) {

// If the process_title was never read before nor explicitly set,

// we must query it with getConsoleTitleW

if (!process_title) {

process_title = _getProcessTitle();

}

if (process_title) {

*len = strlen(process_title);

return process_title;

} else {

*len = 0;

return NULL;

}

int Platform::GetMemory(size_t *rss, size_t *vsize) {

HANDLE current_process = GetCurrentProcess();

PROCESS_MEMORY_COUNTERS pmc;

if ( !GetProcessMemoryInfo( current_process, &pmc, sizeof(pmc)) )

{

winapi_perror("GetProcessMemoryInfo");

}

*rss = pmc.WorkingSetSize;

*vsize = 0; // FIXME

return 0;

}

double Platform::GetFreeMemory() {

MEMORYSTATUSEX memory_status;

memory_status.dwLength = sizeof(memory_status);

if(!GlobalMemoryStatusEx(&memory_status))

{

winapi_perror("GlobalMemoryStatusEx");

}

return (double)memory_status.ullAvailPhys;

}

double Platform::GetTotalMemory() {

MEMORYSTATUSEX memory_status;

memory_status.dwLength = sizeof(memory_status);

if(!GlobalMemoryStatusEx(&memory_status))

{

winapi_perror("GlobalMemoryStatusEx");

}

return (double)memory_status.ullTotalPhys;

}

int Platform::GetCPUInfo(Local<Array> *cpus) {

return -1;

}

double Platform::GetUptimeImpl() {

return (double)GetTickCount()/1000.0;

}

int Platform::GetLoadAvg(Local<Array> *loads) {

return -1;

}

Handle<Value> Platform::GetInterfaceAddresses() {

HandleScope scope;

return scope.Close(Object::New());

}

} // namespace node

node/src/platform_win32.cc at pathfix · wave2future/node · GitHub

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