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143 lines
3.9 KiB
143 lines
3.9 KiB
/** |
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* Platform compatibility layer for POSIX functions on Windows |
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*/ |
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#ifndef PLATFORM_COMPAT_H |
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#define PLATFORM_COMPAT_H |
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#ifdef _WIN32 |
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#include <winsock2.h> |
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#include <ws2tcpip.h> |
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#include <windows.h> |
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#include <io.h> |
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#include <time.h> |
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#include <fcntl.h> |
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#include <stdint.h> |
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// POSIX functions missing on Windows |
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#define strcasecmp _stricmp |
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#define strncasecmp _strnicmp |
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// poll() and pollfd are already defined in winsock2.h on MSYS2 UCRT64 |
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// Only define if not already present |
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#ifndef POLLIN |
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#define POLLIN 0x0001 |
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#endif |
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#ifndef POLLOUT |
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#define POLLOUT 0x0004 |
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#endif |
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#ifndef POLLERR |
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#define POLLERR 0x0008 |
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#endif |
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#ifndef POLLHUP |
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#define POLLHUP 0x0010 |
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#endif |
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#ifndef POLLNVAL |
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#define POLLNVAL 0x0020 |
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#endif |
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#ifndef POLLPRI |
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#define POLLPRI 0x0002 |
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#endif |
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// ssize_t for Windows (signed size type) |
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#ifndef _SSIZE_T_DEFINED |
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typedef long ssize_t; |
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#define _SSIZE_T_DEFINED |
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#endif |
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// gettimeofday for Windows - provide our own implementation if not already defined |
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#ifndef _GETTIMEOFDAY_DEFINED |
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#define _GETTIMEOFDAY_DEFINED |
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static inline int utun_gettimeofday(struct timeval *tv, void *tz) { |
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FILETIME ft; |
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unsigned __int64 tmpres = 0; |
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if (tv != NULL) { |
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GetSystemTimeAsFileTime(&ft); |
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tmpres |= ft.dwHighDateTime; |
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tmpres <<= 32; |
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tmpres |= ft.dwLowDateTime; |
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// Convert from 100-nanosecond intervals to microseconds |
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tmpres /= 10; |
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// Convert to Unix epoch (January 1, 1970) |
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tmpres -= 11644473600000000ULL; |
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tv->tv_sec = (long)(tmpres / 1000000UL); |
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tv->tv_usec = (long)(tmpres % 1000000UL); |
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} |
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// tz parameter is ignored (for compatibility with POSIX) |
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return 0; |
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} |
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#endif // _GETTIMEOFDAY_DEFINED |
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// Pipe creation for Windows |
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static inline int platform_pipe(int pipefd[2]) { |
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return _pipe(pipefd, 4096, _O_BINARY); |
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} |
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#define pipe platform_pipe |
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// nfds_t already defined in winsock2.h on MSYS2 |
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// fcntl replacement for Windows (simplified - only supports F_GETFL/F_SETFL with O_NONBLOCK) |
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#ifndef F_GETFL |
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#define F_GETFL 3 |
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#endif |
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#ifndef F_SETFL |
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#define F_SETFL 4 |
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#endif |
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#ifndef O_NONBLOCK |
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#define O_NONBLOCK 0x4000 |
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#endif |
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static inline int platform_fcntl(int fd, int cmd, ... /* arg */ ) { |
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va_list ap; |
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va_start(ap, cmd); |
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if (cmd == F_GETFL) { |
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va_end(ap); |
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// Return current flags (always 0 on Windows, can't query easily) |
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return 0; |
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} else if (cmd == F_SETFL) { |
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int flags = va_arg(ap, int); |
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va_end(ap); |
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if (flags & O_NONBLOCK) { |
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// Set non-blocking mode |
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u_long mode = 1; |
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return ioctlsocket(fd, FIONBIO, &mode); |
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} |
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return 0; |
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} |
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va_end(ap); |
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errno = EINVAL; |
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return -1; |
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} |
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#define fcntl platform_fcntl |
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// nanosleep already defined in pthread_time.h on MSYS2 |
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// poll() and pollfd already defined in winsock2.h on MSYS2 |
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// Use WSAPoll on Windows (available in Vista and later) |
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#define poll WSAPoll |
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// sa_family_t might not be defined on some Windows setups |
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#ifndef sa_family_t |
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typedef unsigned short sa_family_t; |
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#endif |
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#else |
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// POSIX - include standard headers |
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#include <sys/time.h> |
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#include <strings.h> |
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#include <arpa/inet.h> |
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#include <netinet/in.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <poll.h> |
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#endif |
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// Generate cryptographically secure random bytes |
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// Returns 0 on success, -1 on error |
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int random_bytes(uint8_t *buffer, size_t len); |
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#endif // PLATFORM_COMPAT_H
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