150 lines
3.2 KiB
C++
150 lines
3.2 KiB
C++
#include "master.hpp"
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namespace factor
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{
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HMODULE hFactorDll;
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void factor_vm::init_ffi()
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{
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hFactorDll = GetModuleHandle(FACTOR_DLL);
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if(!hFactorDll)
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fatal_error("GetModuleHandle(\"" FACTOR_DLL_NAME "\") failed", 0);
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}
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void factor_vm::ffi_dlopen(dll *dll)
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{
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dll->dll = LoadLibraryEx((WCHAR *)alien_offset(dll->path), NULL, 0);
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}
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void *factor_vm::ffi_dlsym(dll *dll, symbol_char *symbol)
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{
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return (void *)GetProcAddress(dll ? (HMODULE)dll->dll : hFactorDll, symbol);
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}
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void factor_vm::ffi_dlclose(dll *dll)
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{
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FreeLibrary((HMODULE)dll->dll);
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dll->dll = NULL;
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}
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bool factor_vm::windows_stat(vm_char *path)
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{
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BY_HANDLE_FILE_INFORMATION bhfi;
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HANDLE h = CreateFileW(path,
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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NULL);
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if(h == INVALID_HANDLE_VALUE)
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{
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// FindFirstFile is the only call that can stat c:\pagefile.sys
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WIN32_FIND_DATA st;
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HANDLE h;
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if(INVALID_HANDLE_VALUE == (h = FindFirstFile(path, &st)))
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return false;
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FindClose(h);
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return true;
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}
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bool ret;
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ret = GetFileInformationByHandle(h, &bhfi);
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CloseHandle(h);
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return ret;
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}
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void factor_vm::windows_image_path(vm_char *full_path, vm_char *temp_path, unsigned int length)
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{
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snwprintf(temp_path, length-1, L"%s.image", full_path);
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temp_path[length - 1] = 0;
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}
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/* You must free() this yourself. */
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const vm_char *factor_vm::default_image_path()
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{
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vm_char full_path[MAX_UNICODE_PATH];
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vm_char *ptr;
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vm_char temp_path[MAX_UNICODE_PATH];
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if(!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
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fatal_error("GetModuleFileName() failed", 0);
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if((ptr = wcsrchr(full_path, '.')))
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*ptr = 0;
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snwprintf(temp_path, MAX_UNICODE_PATH-1, L"%s.image", full_path);
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temp_path[MAX_UNICODE_PATH - 1] = 0;
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return safe_strdup(temp_path);
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}
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/* You must free() this yourself. */
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const vm_char *factor_vm::vm_executable_path()
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{
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vm_char full_path[MAX_UNICODE_PATH];
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if(!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
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fatal_error("GetModuleFileName() failed", 0);
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return safe_strdup(full_path);
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}
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inline void factor_vm::primitive_existsp()
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{
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vm_char *path = untag_check<byte_array>(dpop())->data<vm_char>();
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box_boolean(windows_stat(path));
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}
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PRIMITIVE_FORWARD(existsp)
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segment::segment(factor_vm *myvm_, cell size_)
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{
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myvm = myvm_;
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size = size_;
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char *mem;
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DWORD ignore;
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if((mem = (char *)VirtualAlloc(NULL, getpagesize() * 2 + size,
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MEM_COMMIT, PAGE_EXECUTE_READWRITE)) == 0)
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myvm->out_of_memory();
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if (!VirtualProtect(mem, getpagesize(), PAGE_NOACCESS, &ignore))
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fatal_error("Cannot allocate low guard page", (cell)mem);
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if (!VirtualProtect(mem + size + getpagesize(),
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getpagesize(), PAGE_NOACCESS, &ignore))
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fatal_error("Cannot allocate high guard page", (cell)mem);
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start = (cell)mem + getpagesize();
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end = start + size;
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}
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segment::~segment()
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{
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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if(!VirtualFree((void*)(start - si.dwPageSize), 0, MEM_RELEASE))
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myvm->fatal_error("Segment deallocation failed",0);
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}
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void factor_vm::sleep_micros(u64 usec)
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{
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Sleep((DWORD)(usec / 1000));
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}
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long getpagesize()
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{
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static long g_pagesize = 0;
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if (! g_pagesize)
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{
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SYSTEM_INFO system_info;
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GetSystemInfo (&system_info);
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g_pagesize = system_info.dwPageSize;
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}
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return g_pagesize;
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}
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}
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