LookingGlass/c-host/windows/platform.c
2019-03-03 23:30:02 +11:00

340 lines
8.3 KiB
C

/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program 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 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <windows.h>
#include <setupapi.h>
#include "app.h"
#include "debug.h"
#include "windebug.h"
#include "ivshmem/Public.h"
static HANDLE shmemHandle = INVALID_HANDLE_VALUE;
static bool shmemOwned = false;
static IVSHMEM_MMAP shmemMap = {0};
static HWND messageWnd;
struct osThreadHandle
{
const char * name;
osThreadFunction function;
void * opaque;
HANDLE handle;
DWORD threadID;
int resultCode;
};
LRESULT CALLBACK DummyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
static int appThread(void * opaque)
{
int result = app_main();
SendMessage(messageWnd, WM_CLOSE, 0, 0);
return result;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
int result = 0;
HDEVINFO deviceInfoSet;
PSP_DEVICE_INTERFACE_DETAIL_DATA infData = NULL;
SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
#if 0
// redirect stderr to a file
{
char tempPath[MAX_PATH+1];
GetTempPathA(sizeof(tempPath), tempPath);
int len = snprintf(NULL, 0, "%slooking-glass-host.txt", tempPath);
char * path = malloc(len + 1);
sprintf(path, "%slooking-glass-host.txt", tempPath);
freopen(path, "a", stderr);
free(path);
}
#endif
// always flush stderr
setbuf(stderr, NULL);
deviceInfoSet = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES | DIGCF_DEVICEINTERFACE);
memset(&deviceInterfaceData, 0, sizeof(SP_DEVICE_INTERFACE_DATA));
deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
if (SetupDiEnumDeviceInterfaces(deviceInfoSet, NULL, &GUID_DEVINTERFACE_IVSHMEM, 0, &deviceInterfaceData) == FALSE)
{
DWORD error = GetLastError();
if (error == ERROR_NO_MORE_ITEMS)
{
DEBUG_WINERROR("Unable to enumerate the device, is it attached?", error);
result = -1;
goto finish;
}
DEBUG_WINERROR("SetupDiEnumDeviceInterfaces failed", error);
result = -1;
goto finish;
}
DWORD reqSize = 0;
SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &reqSize, NULL);
if (!reqSize)
{
DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
result = -1;
goto finish;
}
infData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)calloc(reqSize, 1);
infData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
if (!SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, infData, reqSize, NULL, NULL))
{
free(infData);
DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
result = -1;
goto finish;
}
shmemHandle = CreateFile(infData->DevicePath, 0, 0, NULL, OPEN_EXISTING, 0, 0);
if (shmemHandle == INVALID_HANDLE_VALUE)
{
SetupDiDestroyDeviceInfoList(deviceInfoSet);
free(infData);
DEBUG_WINERROR("CreateFile returned INVALID_HANDLE_VALUE", GetLastError());
result = -1;
goto finish;
}
free(infData);
SetupDiDestroyDeviceInfoList(deviceInfoSet);
// create a message window so that our message pump works
WNDCLASSEX wx = {};
wx.cbSize = sizeof(WNDCLASSEX);
wx.lpfnWndProc = DummyWndProc;
wx.hInstance = hInstance;
wx.lpszClassName = "DUMMY_CLASS";
if (!RegisterClassEx(&wx))
{
DEBUG_ERROR("Failed to register message window class");
result = -1;
goto finish_shmem;
}
messageWnd = CreateWindowEx(0, "DUMMY_CLASS", "DUMMY_NAME", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
osThreadHandle * thread;
if (!os_createThread("appThread", appThread, NULL, &thread))
{
DEBUG_ERROR("Failed to create the main application thread");
result = -1;
goto finish_shmem;
}
while(true)
{
MSG msg;
BOOL bRet = GetMessage(&msg, NULL, 0, 0);
if (bRet > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else if (bRet < 0)
{
DEBUG_ERROR("Unknown error from GetMessage");
result = -1;
goto shutdown;
}
DEBUG_INFO("Platform shutdown");
break;
}
shutdown:
app_quit();
if (!os_joinThread(thread, &result))
{
DEBUG_ERROR("Failed to join the main application thread");
result = -1;
}
finish_shmem:
os_shmemUnmap();
CloseHandle(shmemHandle);
finish:
return result;
}
unsigned int os_shmemSize()
{
IVSHMEM_SIZE size;
if (!DeviceIoControl(shmemHandle, IOCTL_IVSHMEM_REQUEST_SIZE, NULL, 0, &size, sizeof(IVSHMEM_SIZE), NULL, NULL))
{
DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
return 0;
}
return (unsigned int)size;
}
bool os_shmemMmap(void **ptr)
{
if (shmemOwned)
{
*ptr = shmemMap.ptr;
return true;
}
memset(&shmemMap, 0, sizeof(IVSHMEM_MMAP));
if (!DeviceIoControl(
shmemHandle,
IOCTL_IVSHMEM_REQUEST_MMAP,
NULL, 0,
&shmemMap, sizeof(IVSHMEM_MMAP),
NULL, NULL))
{
DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
return false;
}
*ptr = shmemMap.ptr;
shmemOwned = true;
return true;
}
void os_shmemUnmap()
{
if (!shmemOwned)
return;
if (!DeviceIoControl(shmemHandle, IOCTL_IVSHMEM_RELEASE_MMAP, NULL, 0, NULL, 0, NULL, NULL))
DEBUG_WINERROR("DeviceIoControl failed", GetLastError());
else
shmemOwned = false;
}
static DWORD WINAPI threadWrapper(LPVOID lpParameter)
{
osThreadHandle * handle = (osThreadHandle *)lpParameter;
handle->resultCode = handle->function(handle->opaque);
return 0;
}
bool os_createThread(const char * name, osThreadFunction function, void * opaque, osThreadHandle ** handle)
{
*handle = (osThreadHandle *)malloc(sizeof(osThreadHandle));
(*handle)->name = name;
(*handle)->function = function;
(*handle)->opaque = opaque;
(*handle)->handle = CreateThread(NULL, 0, threadWrapper, *handle, 0, &(*handle)->threadID);
if (!(*handle)->handle)
{
free(*handle);
*handle = NULL;
DEBUG_WINERROR("CreateThread failed", GetLastError());
return false;
}
return true;
}
bool os_joinThread(osThreadHandle * handle, int * resultCode)
{
while(true)
{
switch(WaitForSingleObject(handle->handle, INFINITE))
{
case WAIT_OBJECT_0:
if (resultCode)
*resultCode = handle->resultCode;
CloseHandle(handle->handle);
free(handle);
return true;
case WAIT_ABANDONED:
case WAIT_TIMEOUT:
continue;
case WAIT_FAILED:
DEBUG_WINERROR("Wait for thread failed", GetLastError());
CloseHandle(handle->handle);
free(handle);
return false;
}
break;
}
DEBUG_WINERROR("Unknown failure waiting for thread", GetLastError());
return false;
}
osEventHandle * os_createEvent()
{
HANDLE event = CreateEvent(NULL, FALSE, FALSE, NULL);
return (osEventHandle*)event;
}
void os_freeEvent(osEventHandle * handle)
{
CloseHandle((HANDLE)handle);
}
bool os_waitEvent(osEventHandle * handle)
{
while(true)
{
switch(WaitForSingleObject((HANDLE)handle, INFINITE))
{
case WAIT_OBJECT_0:
return true;
case WAIT_ABANDONED:
case WAIT_TIMEOUT:
continue;
case WAIT_FAILED:
DEBUG_WINERROR("Wait for event failed", GetLastError());
return false;
}
DEBUG_ERROR("Unknown wait event return code");
return false;
}
}
bool os_signalEvent(osEventHandle * handle)
{
return SetEvent((HANDLE)handle);
}