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[common] move ivshmem code into the common library

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This commit is contained in:
Geoffrey McRae
2020-01-03 14:53:56 +11:00
parent c5baf212c8
commit 89d6ea0b5d
11 changed files with 446 additions and 361 deletions
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128
c-host/platform/Windows/src/platform.c
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@@ -21,10 +21,8 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "windows/mousehook.h"
#include <windows.h>
#include <setupapi.h>
#include <shellapi.h>
#include <fcntl.h>
#include <io.h>
#include "interface/platform.h"
#include "common/debug.h"
@@ -32,7 +30,6 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "common/option.h"
#include "common/locking.h"
#include "common/thread.h"
#include "ivshmem.h"
#define ID_MENU_OPEN_LOG 3000
#define ID_MENU_EXIT 3001
@@ -46,19 +43,11 @@ struct AppState
char ** argv;
char executable[MAX_PATH + 1];
HANDLE shmemHandle;
bool shmemOwned;
IVSHMEM_MMAP shmemMap;
HWND messageWnd;
HMENU trayMenu;
};
static struct AppState app =
{
.shmemHandle = INVALID_HANDLE_VALUE,
.shmemOwned = false,
.shmemMap = {0}
};
static struct AppState app = {0};
// undocumented API to adjust the system timer resolution (yes, its a nasty hack)
typedef NTSTATUS (__stdcall *ZwSetTimerResolution_t)(ULONG RequestedResolution, BOOLEAN Set, PULONG ActualResolution);
@@ -180,13 +169,6 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
struct Option options[] =
{
{
.module = "os",
.name = "shmDevice",
.description = "The IVSHMEM device to use",
.type = OPTION_TYPE_INT,
.value.x_int = 0
},
{
.module = "os",
.name = "logFile",
@@ -278,10 +260,6 @@ shutdown:
}
finish:
os_shmemUnmap();
if (app.shmemHandle != INVALID_HANDLE_VALUE)
CloseHandle(app.shmemHandle);
for(int i = 0; i < app.argc; ++i)
free(app.argv[i]);
@@ -292,7 +270,6 @@ finish:
bool app_init()
{
const int shmDevice = option_get_int ("os", "shmDevice");
const char * logFile = option_get_string("os", "logFile" );
// redirect stderr to a file
@@ -314,113 +291,10 @@ bool app_init()
// get the performance frequency for spinlocks
QueryPerformanceFrequency(&app.perfFreq);
HDEVINFO deviceInfoSet;
PSP_DEVICE_INTERFACE_DETAIL_DATA infData = NULL;
SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
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, shmDevice, &deviceInterfaceData) == FALSE)
{
DWORD error = GetLastError();
if (error == ERROR_NO_MORE_ITEMS)
{
DEBUG_WINERROR("Unable to enumerate the device, is it attached?", error);
return false;
}
DEBUG_WINERROR("SetupDiEnumDeviceInterfaces failed", error);
return false;
}
DWORD reqSize = 0;
SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &reqSize, NULL);
if (!reqSize)
{
DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
return false;
}
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());
return false;
}
app.shmemHandle = CreateFile(infData->DevicePath, 0, 0, NULL, OPEN_EXISTING, 0, 0);
if (app.shmemHandle == INVALID_HANDLE_VALUE)
{
SetupDiDestroyDeviceInfoList(deviceInfoSet);
free(infData);
DEBUG_WINERROR("CreateFile returned INVALID_HANDLE_VALUE", GetLastError());
return false;
}
free(infData);
SetupDiDestroyDeviceInfoList(deviceInfoSet);
return true;
}
const char * os_getExecutable()
{
return app.executable;
}
unsigned int os_shmemSize()
{
IVSHMEM_SIZE size;
if (!DeviceIoControl(app.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 (app.shmemOwned)
{
*ptr = app.shmemMap.ptr;
return true;
}
IVSHMEM_MMAP_CONFIG config =
{
.cacheMode = IVSHMEM_CACHE_WRITECOMBINED
};
memset(&app.shmemMap, 0, sizeof(IVSHMEM_MMAP));
if (!DeviceIoControl(
app.shmemHandle,
IOCTL_IVSHMEM_REQUEST_MMAP,
&config, sizeof(IVSHMEM_MMAP_CONFIG),
&app.shmemMap, sizeof(IVSHMEM_MMAP),
NULL, NULL))
{
DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
return false;
}
*ptr = app.shmemMap.ptr;
app.shmemOwned = true;
return true;
}
void os_shmemUnmap()
{
if (!app.shmemOwned)
return;
if (!DeviceIoControl(app.shmemHandle, IOCTL_IVSHMEM_RELEASE_MMAP, NULL, 0, NULL, 0, NULL, NULL))
DEBUG_WINERROR("DeviceIoControl failed", GetLastError());
else
app.shmemOwned = false;
}