/* * librdkafka - Apache Kafka C library * * Copyright (c) 2012-2022, Magnus Edenhill * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /** * Win32 (Visual Studio) support */ #ifndef _RDWIN32_H_ #define _RDWIN32_H_ #include #include #include #include #include #define WIN32_MEAN_AND_LEAN #include /* for sockets + struct timeval */ #include #include /** * Types */ #ifndef _SSIZE_T_DEFINED #define _SSIZE_T_DEFINED typedef SSIZE_T ssize_t; #endif typedef int socklen_t; struct iovec { void *iov_base; size_t iov_len; }; struct msghdr { struct iovec *msg_iov; int msg_iovlen; }; /** * Annotations, attributes, optimizers */ #ifndef likely #define likely(x) x #endif #ifndef unlikely #define unlikely(x) x #endif #define RD_UNUSED #define RD_INLINE __inline #define RD_WARN_UNUSED_RESULT #define RD_NORETURN __declspec(noreturn) #define RD_IS_CONSTANT(p) (0) #ifdef _MSC_VER #define RD_TLS __declspec(thread) #elif defined(__MINGW32__) #define RD_TLS __thread #else #error Unknown Windows compiler, cannot set RD_TLS (thread-local-storage attribute) #endif /** * Allocation */ #define rd_alloca(N) _alloca(N) /** * Strings, formatting, printf, .. */ /* size_t and ssize_t format strings */ #define PRIusz "Iu" #define PRIdsz "Id" #ifndef RD_FORMAT #define RD_FORMAT(...) #endif static RD_UNUSED RD_INLINE int rd_vsnprintf(char *str, size_t size, const char *format, va_list ap) { int cnt = -1; if (size != 0) cnt = _vsnprintf_s(str, size, _TRUNCATE, format, ap); if (cnt == -1) cnt = _vscprintf(format, ap); return cnt; } static RD_UNUSED RD_INLINE int rd_snprintf(char *str, size_t size, const char *format, ...) { int cnt; va_list ap; va_start(ap, format); cnt = rd_vsnprintf(str, size, format, ap); va_end(ap); return cnt; } #define rd_strcasecmp(A, B) _stricmp(A, B) #define rd_strncasecmp(A, B, N) _strnicmp(A, B, N) /* There is a StrStrIA() but it requires extra linking, so use our own * implementation instead. */ #define rd_strcasestr(HAYSTACK, NEEDLE) _rd_strcasestr(HAYSTACK, NEEDLE) /** * Errors */ /* MSVC: * This is the correct way to set errno on Windows, * but it is still pointless due to different errnos in * in different runtimes: * https://social.msdn.microsoft.com/Forums/vstudio/en-US/b4500c0d-1b69-40c7-9ef5-08da1025b5bf/setting-errno-from-within-a-dll?forum=vclanguage/ * errno is thus highly deprecated, and buggy, on Windows * when using librdkafka as a dynamically loaded DLL. */ #define rd_set_errno(err) _set_errno((err)) static RD_INLINE RD_UNUSED const char *rd_strerror(int err) { static RD_TLS char ret[128]; strerror_s(ret, sizeof(ret) - 1, err); return ret; } /** * @brief strerror() for Win32 API errors as returned by GetLastError() et.al. */ static RD_UNUSED char * rd_strerror_w32(DWORD errcode, char *dst, size_t dstsize) { char *t; FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errcode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)dst, (DWORD)dstsize - 1, NULL); /* Remove newlines */ while ((t = strchr(dst, (int)'\r')) || (t = strchr(dst, (int)'\n'))) *t = (char)'.'; return dst; } /** * Atomics */ #ifndef __cplusplus #include "rdatomic.h" #endif /** * Misc */ /** * Microsecond sleep. * 'retry': if true, retry if sleep is interrupted (because of signal) */ #define rd_usleep(usec, terminate) Sleep((usec) / 1000) /** * @brief gettimeofday() for win32 */ static RD_UNUSED int rd_gettimeofday(struct timeval *tv, struct timezone *tz) { SYSTEMTIME st; FILETIME ft; ULARGE_INTEGER d; GetSystemTime(&st); SystemTimeToFileTime(&st, &ft); d.HighPart = ft.dwHighDateTime; d.LowPart = ft.dwLowDateTime; tv->tv_sec = (long)((d.QuadPart - 116444736000000000llu) / 10000000L); tv->tv_usec = (long)(st.wMilliseconds * 1000); return 0; } #define rd_assert(EXPR) assert(EXPR) static RD_INLINE RD_UNUSED const char *rd_getenv(const char *env, const char *def) { static RD_TLS char tmp[512]; DWORD r; r = GetEnvironmentVariableA(env, tmp, sizeof(tmp)); if (r == 0 || r > sizeof(tmp)) return def; return tmp; } /** * Empty struct initializer */ #define RD_ZERO_INIT \ { 0 } #ifndef __cplusplus /** * Sockets, IO */ /** @brief Socket type */ typedef SOCKET rd_socket_t; /** @brief Socket API error return value */ #define RD_SOCKET_ERROR SOCKET_ERROR /** @brief Last socket error */ #define rd_socket_errno WSAGetLastError() /** @brief String representation of socket error */ static RD_UNUSED const char *rd_socket_strerror(int err) { static RD_TLS char buf[256]; rd_strerror_w32(err, buf, sizeof(buf)); return buf; } /** @brief WSAPoll() struct type */ typedef WSAPOLLFD rd_pollfd_t; /** @brief poll(2) */ #define rd_socket_poll(POLLFD, FDCNT, TIMEOUT_MS) \ WSAPoll(POLLFD, FDCNT, TIMEOUT_MS) /** * @brief Set socket to non-blocking * @returns 0 on success or -1 on failure (see rd_kafka_rd_socket_errno) */ static RD_UNUSED int rd_fd_set_nonblocking(rd_socket_t fd) { u_long on = 1; if (ioctlsocket(fd, FIONBIO, &on) == SOCKET_ERROR) return (int)WSAGetLastError(); return 0; } /** * @brief Create non-blocking pipe * @returns 0 on success or errno on failure */ static RD_UNUSED int rd_pipe_nonblocking(rd_socket_t *fds) { /* On windows, the "pipe" will be a tcp connection. * This is to allow WSAPoll to be used to poll pipe events */ SOCKET listen_s = INVALID_SOCKET; SOCKET accept_s = INVALID_SOCKET; SOCKET connect_s = INVALID_SOCKET; struct sockaddr_in listen_addr; struct sockaddr_in connect_addr; socklen_t sock_len = 0; int bufsz; /* Create listen socket */ listen_s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (listen_s == INVALID_SOCKET) goto err; listen_addr.sin_family = AF_INET; listen_addr.sin_addr.s_addr = ntohl(INADDR_LOOPBACK); listen_addr.sin_port = 0; if (bind(listen_s, (struct sockaddr *)&listen_addr, sizeof(listen_addr)) != 0) goto err; sock_len = sizeof(connect_addr); if (getsockname(listen_s, (struct sockaddr *)&connect_addr, &sock_len) != 0) goto err; if (listen(listen_s, 1) != 0) goto err; /* Create connection socket */ connect_s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (connect_s == INVALID_SOCKET) goto err; if (connect(connect_s, (struct sockaddr *)&connect_addr, sizeof(connect_addr)) == SOCKET_ERROR) goto err; /* Wait for incoming connection */ accept_s = accept(listen_s, NULL, NULL); if (accept_s == SOCKET_ERROR) goto err; /* Done with listening */ closesocket(listen_s); if (rd_fd_set_nonblocking(accept_s) != 0) goto err; if (rd_fd_set_nonblocking(connect_s) != 0) goto err; /* Minimize buffer sizes to avoid a large number * of signaling bytes to accumulate when * io-signalled queue is not being served for a while. */ bufsz = 100; setsockopt(accept_s, SOL_SOCKET, SO_SNDBUF, (const char *)&bufsz, sizeof(bufsz)); bufsz = 100; setsockopt(accept_s, SOL_SOCKET, SO_RCVBUF, (const char *)&bufsz, sizeof(bufsz)); bufsz = 100; setsockopt(connect_s, SOL_SOCKET, SO_SNDBUF, (const char *)&bufsz, sizeof(bufsz)); bufsz = 100; setsockopt(connect_s, SOL_SOCKET, SO_RCVBUF, (const char *)&bufsz, sizeof(bufsz)); /* Store resulting sockets. * They are bidirectional, so it does not matter which is read or * write side of pipe. */ fds[0] = accept_s; fds[1] = connect_s; return 0; err: if (listen_s != INVALID_SOCKET) closesocket(listen_s); if (accept_s != INVALID_SOCKET) closesocket(accept_s); if (connect_s != INVALID_SOCKET) closesocket(connect_s); return -1; } /* Socket IO */ #define rd_socket_read(fd, buf, sz) recv(fd, buf, sz, 0) #define rd_socket_write(fd, buf, sz) send(fd, buf, sz, 0) #define rd_socket_close(fd) closesocket(fd) /* File IO */ #define rd_write(fd, buf, sz) _write(fd, buf, sz) #define rd_open(path, flags, mode) _open(path, flags, mode) #define rd_close(fd) _close(fd) #endif /* !__cplusplus*/ #endif /* _RDWIN32_H_ */