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This commit is contained in:
Edward R. Gonzalez
2026-02-19 17:11:49 -05:00
parent 437fcde98d
commit b9d39d9d79
3 changed files with 266 additions and 33 deletions
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attempt_1/winapi.sample.c Normal file
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#pragma region OS
#pragma warning(push)
#pragma warning(disable: 4820)
#pragma comment(lib, "Kernel32.lib")
#pragma comment(lib, "Advapi32.lib")
#define MS_INVALID_HANDLE_VALUE ((MS_HANDLE)(S8)-1)
#define MS_ANYSIZE_ARRAY 1
#define MS_MEM_COMMIT 0x00001000
#define MS_MEM_RESERVE 0x00002000
#define MS_MEM_RELEASE 0x00008000
#define MS_MEM_LARGE_PAGES 0x20000000
#define MS_PAGE_READWRITE 0x04
#define MS_TOKEN_ADJUST_PRIVILEGES (0x0020)
#define MS_SE_PRIVILEGE_ENABLED (0x00000002L)
#define MS_TOKEN_QUERY (0x0008)
#define MS__TEXT(quote) L ## quote // r_winnt
#define MS_TEXT(quote) MS__TEXT(quote) // r_winnt
#define MS_SE_LOCK_MEMORY_NAME MS_TEXT("SeLockMemoryPrivilege")
typedef int MS_BOOL;
typedef unsigned long MS_DWORD;
typedef MS_DWORD* MS_PDWORD;
typedef void* MS_HANDLE;
typedef MS_HANDLE* MS_PHANDLE;
typedef long MS_LONG;
typedef S8 MS_LONGLONG;
typedef char const* MS_LPCSTR;
typedef unsigned short* MS_LPWSTR, *MS_PWSTR;
typedef void* MS_LPVOID;
typedef MS_DWORD* MS_LPDWORD;
typedef U8 MS_ULONG_PTR, *MS_PULONG_PTR;
typedef void const* MS_LPCVOID;
typedef struct MS_SECURITY_ATTRIBUTES *MS_PSECURITY_ATTRIBUTES, *MS_LPSECURITY_ATTRIBUTES;
typedef struct MS_OVERLAPPED *MS_LPOVERLAPPED;
typedef def_union(MS_LARGE_INTEGER) { struct { MS_DWORD LowPart; MS_LONG HighPart; } _; struct { MS_DWORD LowPart; MS_LONG HighPart; } u; MS_LONGLONG QuadPart; };
typedef def_struct(MS_FILE) { void* _Placeholder; };
typedef def_struct(MS_SECURITY_ATTRIBUTES) { MS_DWORD nLength; A4_B1 _PAD_; MS_LPVOID lpSecurityDescriptor; MS_BOOL bInheritHandle; };
typedef def_struct(MS_OVERLAPPED) { MS_ULONG_PTR Internal; MS_ULONG_PTR InternalHigh; union { struct { MS_DWORD Offset; MS_DWORD OffsetHigh; } _; void* Pointer; } _; MS_HANDLE hEvent; };
typedef struct MS_LUID* MS_PLUID;
typedef struct MS_LUID_AND_ATTRIBUTES* MS_PLUID_AND_ATTRIBUTES;
typedef struct MS_TOKEN_PRIVILEGES* MS_PTOKEN_PRIVILEGES;
typedef def_struct(MS_LUID) { MS_DWORD LowPart; MS_LONG HighPart; };
typedef def_struct(MS_LUID_AND_ATTRIBUTES) { MS_LUID Luid; MS_DWORD Attributes; };
typedef def_struct(MS_TOKEN_PRIVILEGES) { MS_DWORD PrivilegeCount; MS_LUID_AND_ATTRIBUTES Privileges[MS_ANYSIZE_ARRAY]; };
WinAPI MS_BOOL CloseHandle(MS_HANDLE hObject);
WinAPI MS_BOOL AdjustTokenPrivileges(MS_HANDLE TokenHandle, MS_BOOL DisableAllPrivileges, MS_PTOKEN_PRIVILEGES NewState, MS_DWORD BufferLength, MS_PTOKEN_PRIVILEGES PreviousState, MS_PDWORD ReturnLength);
WinAPI MS_HANDLE GetCurrentProcess(void);
WinAPI U8 GetLargePageMinimum(void);
WinAPI MS_BOOL LookupPrivilegeValueW(MS_LPWSTR lpSystemName, MS_LPWSTR lpName, MS_PLUID lpLuid);
WinAPI MS_BOOL OpenProcessToken(MS_HANDLE ProcessHandle, MS_DWORD DesiredAccess, MS_PHANDLE TokenHandle);
WinAPI MS_LPVOID VirtualAlloc(MS_LPVOID lpAddress, U8 dwSize, MS_DWORD flAllocationType, MS_DWORD flProtect);
WinAPI MS_BOOL VirtualFree (MS_LPVOID lpAddress, U8 dwSize, MS_DWORD dwFreeType);
#pragma warning(pop)
typedef def_struct(OS_Windows_State) { OS_SystemInfo system_info; };
global OS_Windows_State os__windows_info;
IA_ OS_SystemInfo* os_system_info(void) { return & os__windows_info.system_info; }
I_
void os__enable_large_pages(void) {
MS_HANDLE token;
if (OpenProcessToken(GetCurrentProcess(), MS_TOKEN_ADJUST_PRIVILEGES | MS_TOKEN_QUERY, &token))
{
MS_LUID luid;
if (LookupPrivilegeValueW(0, MS_SE_LOCK_MEMORY_NAME, &luid))
{
MS_TOKEN_PRIVILEGES priv;
priv.PrivilegeCount = 1;
priv.Privileges[0].Luid = luid;
priv.Privileges[0].Attributes = MS_SE_PRIVILEGE_ENABLED;
AdjustTokenPrivileges(token, 0, & priv, size_of(priv), 0, 0);
}
CloseHandle(token);
}
}
I_
void os_init(void) {
os__enable_large_pages();
OS_SystemInfo*R_ info = & os__windows_info.system_info;
info->target_page_size = (U8)GetLargePageMinimum();
}
// TODO(Ed): Large pages disabled for now... (not failing gracefully)
IA_ U8 os__vmem_reserve(U8 size, Opts_vmem*R_ opts) {
assert(opts != nullptr);
void*R_ result = VirtualAlloc(cast(void*R_, opts->base_addr), size
, MS_MEM_RESERVE
// |MS_MEM_COMMIT|(opts->no_large_pages == false ? MS_MEM_LARGE_PAGES : 0)
, MS_PAGE_READWRITE
);
return u8_(result);
}
IA_ B4 os__vmem_commit(U8 vm, U8 size, Opts_vmem*R_ opts) {
assert(opts != nullptr);
// if (opts->no_large_pages == false ) { return 1; }
B4 result = (VirtualAlloc(cast(MS_LPVOID, vm), size, MS_MEM_COMMIT, MS_PAGE_READWRITE) != 0);
return result;
}
I_ void os_vmem_release(U8 vm, U8 size) { VirtualFree(cast(MS_LPVOID, vm), 0, MS_MEM_RELEASE); }
#pragma endregion OS