// license:BSD-3-Clause // copyright-holders:Olivier Galibert, R. Belmont //============================================================ // // sdlos_*.c - OS specific low level code // // SDLMAME by Olivier Galibert and R. Belmont // //============================================================ #define WIN32_LEAN_AND_MEAN #include #include #include #ifndef _MSC_VER #include #endif #include #include // MAME headers #include "osdlib.h" #include "osdcomm.h" #include "osdcore.h" #include "strconv.h" #ifdef OSD_WINDOWS #include "winutf8.h" #endif //============================================================ // MACROS //============================================================ // presumed size of a page of memory #define PAGE_SIZE 4096 // align allocations to start or end of the page? #define GUARD_ALIGN_START 0 #if defined(__BIGGEST_ALIGNMENT__) #define MAX_ALIGNMENT __BIGGEST_ALIGNMENT__ #elif defined(__AVX__) #define MAX_ALIGNMENT 32 #elif defined(__SSE__) || defined(__x86_64__) || defined(_M_X64) #define MAX_ALIGNMENT 16 #else #define MAX_ALIGNMENT sizeof(INT64) #endif //============================================================ // GLOBAL VARIABLES //============================================================ #ifdef OSD_WINDOWS void (*s_debugger_stack_crawler)() = nullptr; #endif //============================================================ // osd_getenv //============================================================ const char *osd_getenv(const char *name) { return getenv(name); } //============================================================ // osd_setenv //============================================================ int osd_setenv(const char *name, const char *value, int overwrite) { char *buf; int result; if (!overwrite) { if (osd_getenv(name) != nullptr) return 0; } buf = (char *) osd_malloc_array(strlen(name)+strlen(value)+2); sprintf(buf, "%s=%s", name, value); result = putenv(buf); /* will be referenced by environment * Therefore it is not freed here */ return result; } //============================================================ // osd_process_kill //============================================================ void osd_process_kill() { std::fflush(stdout); std::fflush(stderr); TerminateProcess(GetCurrentProcess(), -1); } //============================================================ // osd_malloc //============================================================ void *osd_malloc(size_t size) { #ifndef MALLOC_DEBUG return malloc(size); #else // add in space for the size and offset size += MAX_ALIGNMENT + sizeof(size_t) + 2; size &= ~size_t(1); // basic objects just come from the heap UINT8 *const block = reinterpret_cast(HeapAlloc(GetProcessHeap(), 0, size)); if (block == nullptr) return nullptr; UINT8 *const result = reinterpret_cast(reinterpret_cast(block + sizeof(size_t) + MAX_ALIGNMENT) & ~(FPTR(MAX_ALIGNMENT) - 1)); // store the size and return and pointer to the data afterward *reinterpret_cast(block) = size; *(result - 1) = result - block; return result; #endif } //============================================================ // osd_malloc_array //============================================================ void *osd_malloc_array(size_t size) { #ifndef MALLOC_DEBUG return malloc(size); #else // add in space for the size and offset size += MAX_ALIGNMENT + sizeof(size_t) + 2; size &= ~size_t(1); // round the size up to a page boundary size_t const rounded_size = ((size + sizeof(void *) + PAGE_SIZE - 1) / PAGE_SIZE) * PAGE_SIZE; // reserve that much memory, plus two guard pages void *page_base = VirtualAlloc(nullptr, rounded_size + 2 * PAGE_SIZE, MEM_RESERVE, PAGE_NOACCESS); if (page_base == nullptr) return nullptr; // now allow access to everything but the first and last pages page_base = VirtualAlloc(reinterpret_cast(page_base) + PAGE_SIZE, rounded_size, MEM_COMMIT, PAGE_READWRITE); if (page_base == nullptr) return nullptr; // work backwards from the page base to get to the block base UINT8 *const block = GUARD_ALIGN_START ? reinterpret_cast(page_base) : (reinterpret_cast(page_base) + rounded_size - size); UINT8 *const result = reinterpret_cast(reinterpret_cast(block + sizeof(size_t) + MAX_ALIGNMENT) & ~(FPTR(MAX_ALIGNMENT) - 1)); // store the size at the start with a flag indicating it has a guard page *reinterpret_cast(block) = size | 1; *(result - 1) = result - block; return result; #endif } //============================================================ // osd_free //============================================================ void osd_free(void *ptr) { #ifndef MALLOC_DEBUG free(ptr); #else UINT8 const offset = *(reinterpret_cast(ptr) - 1); UINT8 *const block = reinterpret_cast(ptr) - offset; size_t const size = *reinterpret_cast(block); if ((size & 0x1) == 0) { // if no guard page, just free the pointer HeapFree(GetProcessHeap(), 0, block); } else { // large items need more care ULONG_PTR const page_base = reinterpret_cast(block) & ~(PAGE_SIZE - 1); VirtualFree(reinterpret_cast(page_base - PAGE_SIZE), 0, MEM_RELEASE); } #endif } //============================================================ // osd_alloc_executable // // allocates "size" bytes of executable memory. this must take // things like NX support into account. //============================================================ void *osd_alloc_executable(size_t size) { return VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE); } //============================================================ // osd_free_executable // // frees memory allocated with osd_alloc_executable //============================================================ void osd_free_executable(void *ptr, size_t size) { VirtualFree(ptr, 0, MEM_RELEASE); } //============================================================ // osd_break_into_debugger //============================================================ void osd_break_into_debugger(const char *message) { #ifdef OSD_WINDOWS if (IsDebuggerPresent()) { win_output_debug_string_utf8(message); DebugBreak(); } else if (s_debugger_stack_crawler != nullptr) (*s_debugger_stack_crawler)(); #else if (IsDebuggerPresent()) { OutputDebugStringA(message); DebugBreak(); } #endif } //============================================================ // get_clipboard_text_by_format //============================================================ static char *get_clipboard_text_by_format(UINT format, std::string (*convert)(LPCVOID data)) { char *result = nullptr; HANDLE data_handle; LPVOID data; // check to see if this format is available if (IsClipboardFormatAvailable(format)) { // open the clipboard if (OpenClipboard(nullptr)) { // try to access clipboard data data_handle = GetClipboardData(format); if (data_handle != nullptr) { // lock the data data = GlobalLock(data_handle); if (data != nullptr) { // invoke the convert std::string s = (*convert)(data); // copy the string result = (char *) osd_malloc(s.size() + 1); if (result != nullptr) memcpy(result, s.data(), (s.size() + 1) * sizeof(*result)); // unlock the data GlobalUnlock(data_handle); } } // close out the clipboard CloseClipboard(); } } return result; } //============================================================ // convert_wide //============================================================ static std::string convert_wide(LPCVOID data) { return utf8_from_wstring((LPCWSTR) data); } //============================================================ // convert_ansi //============================================================ static std::string convert_ansi(LPCVOID data) { return utf8_from_astring((LPCSTR) data); } //============================================================ // osd_get_clipboard_text //============================================================ char *osd_get_clipboard_text(void) { // try to access unicode text char *result = get_clipboard_text_by_format(CF_UNICODETEXT, convert_wide); // try to access ANSI text if (result == nullptr) result = get_clipboard_text_by_format(CF_TEXT, convert_ansi); return result; } //============================================================ // osd_dynamic_bind //============================================================ #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) // for classic desktop applications #define load_library(filename) LoadLibrary(filename) #else // for Windows Store universal applications #define load_library(filename) LoadPackagedLibrary(filename, 0) #endif namespace osd { class dynamic_module_win32_impl : public dynamic_module { public: dynamic_module_win32_impl(std::vector &libraries) : m_module(nullptr) { m_libraries = libraries; } virtual ~dynamic_module_win32_impl() override { if (m_module != nullptr) FreeLibrary(m_module); }; protected: virtual generic_fptr_t get_symbol_address(char const *symbol) override { /* * given a list of libraries, if a first symbol is successfully loaded from * one of them, all additional symbols will be loaded from the same library */ if (m_module) { return reinterpret_cast(GetProcAddress(m_module, symbol)); } for (auto const &library : m_libraries) { tstring tempstr = tstring_from_utf8(library); HMODULE module = load_library(tempstr.c_str()); if (module != nullptr) { generic_fptr_t function = reinterpret_cast(GetProcAddress(module, symbol)); if (function != nullptr) { m_module = module; return function; } else { FreeLibrary(module); } } } return nullptr; } private: std::vector m_libraries; HMODULE m_module; }; dynamic_module::ptr dynamic_module::open(std::vector &&names) { return std::make_unique(names); } } // namespace osd