[fio.git] / os / windows / posix.c

/* This file contains functions which implement those POSIX and Linux functions
 * that MinGW and Microsoft don't provide. The implementations contain just enough
 * functionality to support fio.
 */

#include <arpa/inet.h>
#include <netinet/in.h>
#include <windows.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <pthread.h>
#include <semaphore.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <sys/uio.h>
#include <sys/resource.h>
#include <sys/poll.h>

#include "../os-windows.h"

extern unsigned long mtime_since_now(struct timeval *);
extern void fio_gettime(struct timeval *, void *);

long sysconf(int name)
{
	long long val = -1;
	DWORD len;
	SYSTEM_LOGICAL_PROCESSOR_INFORMATION processorInfo;
	SYSTEM_INFO sysInfo;
	MEMORYSTATUSEX status;

	switch (name)
	{
	case _SC_NPROCESSORS_ONLN:
		len = sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
		GetLogicalProcessorInformation(&processorInfo, &len);
		val = len / sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
		break;

	case _SC_PAGESIZE:
		GetSystemInfo(&sysInfo);
		val = sysInfo.dwPageSize;
		break;

	case _SC_PHYS_PAGES:
		status.dwLength = sizeof(status);
		GlobalMemoryStatusEx(&status);
		val = status.ullTotalPhys;
		break;
	default:
		log_err("sysconf(%d) is not implemented\n", name);
		break;
	}

	return val;
}

char *dl_error = NULL;

int dlclose(void *handle)
{
	return !FreeLibrary((HMODULE)handle);
}

void *dlopen(const char *file, int mode)
{
	HMODULE hMod;

	hMod = LoadLibrary(file);
	if (hMod == INVALID_HANDLE_VALUE)
		dl_error = (char*)"LoadLibrary failed";
	else
		dl_error = NULL;

	return hMod;
}

void *dlsym(void *handle, const char *name)
{
	FARPROC fnPtr;

	fnPtr = GetProcAddress((HMODULE)handle, name);
	if (fnPtr == NULL)
		dl_error = (char*)"GetProcAddress failed";
	else
		dl_error = NULL;

	return fnPtr;
}

char *dlerror(void)
{
	return dl_error;
}

int gettimeofday(struct timeval *restrict tp, void *restrict tzp)
{
	FILETIME fileTime;
	uint64_t unix_time, windows_time;
	const uint64_t MILLISECONDS_BETWEEN_1601_AND_1970 = 11644473600000;

	/* Ignore the timezone parameter */
	(void)tzp;

	/*
	 * Windows time is stored as the number 100 ns intervals since January 1 1601.
	 * Conversion details from http://www.informit.com/articles/article.aspx?p=102236&seqNum=3
	 * Its precision is 100 ns but accuracy is only one clock tick, or normally around 15 ms.
	 */
	GetSystemTimeAsFileTime(&fileTime);
	windows_time = ((uint64_t)fileTime.dwHighDateTime << 32) + fileTime.dwLowDateTime;
	/* Divide by 10,000 to convert to ms and subtract the time between 1601 and 1970 */
	unix_time = (((windows_time)/10000) - MILLISECONDS_BETWEEN_1601_AND_1970);
	/* unix_time is now the number of milliseconds since 1970 (the Unix epoch) */
	tp->tv_sec = unix_time / 1000;
	tp->tv_usec = (unix_time % 1000) * 1000;
	return 0;
}

void syslog(int priority, const char *message, ... /* argument */)
{
	log_err("%s is not implemented\n", __func__);
}

int sigaction(int sig, const struct sigaction *act,
		struct sigaction *oact)
{
	int rc = 0;
	void (*prev_handler)(int);

	prev_handler = signal(sig, act->sa_handler);
	if (oact != NULL)
		oact->sa_handler = prev_handler;

	if (prev_handler == SIG_ERR)
		rc = -1;

	return rc;
}

int lstat(const char * path, struct stat * buf)
{
	return stat(path, buf);
}

void *mmap(void *addr, size_t len, int prot, int flags,
		int fildes, off_t off)
{
	DWORD vaProt = 0;
	void* allocAddr = NULL;

	if (prot & PROT_NONE)
		vaProt |= PAGE_NOACCESS;

	if ((prot & PROT_READ) && !(prot & PROT_WRITE))
		vaProt |= PAGE_READONLY;

	if (prot & PROT_WRITE)
		vaProt |= PAGE_READWRITE;

	if ((flags & MAP_ANON) | (flags & MAP_ANONYMOUS))
	{
		allocAddr = VirtualAlloc(addr, len, MEM_COMMIT, vaProt);
	}

	return allocAddr;
}

int munmap(void *addr, size_t len)
{
	return !VirtualFree(addr, 0, MEM_RELEASE);
}

int fork(void)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

pid_t setsid(void)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

void openlog(const char *ident, int logopt, int facility)
{
	log_err("%s is not implemented\n", __func__);
}

void closelog(void)
{
	log_err("%s is not implemented\n", __func__);
}

int kill(pid_t pid, int sig)
{
	errno = ESRCH;
	return (-1);
}

/*
 * This is assumed to be used only by the network code,
 * and so doesn't try and handle any of the other cases
 */
int fcntl(int fildes, int cmd, ...)
{
	/*
	 * non-blocking mode doesn't work the same as in BSD sockets,
	 * so ignore it.
	 */
#if 0
	va_list ap;
	int val, opt, status;

	if (cmd == F_GETFL)
		return 0;
	else if (cmd != F_SETFL) {
		errno = EINVAL;
		return (-1);
	}

	va_start(ap, 1);

	opt = va_arg(ap, int);
	if (opt & O_NONBLOCK)
		val = 1;
	else
		val = 0;

	status = ioctlsocket((SOCKET)fildes, opt, &val);

	if (status == SOCKET_ERROR) {
		errno = EINVAL;
		val = -1;
	}

	va_end(ap);

	return val;
#endif
return 0;
}

/*
 * Get the value of a local clock source.
 * This implementation supports 2 clocks: CLOCK_MONOTONIC provides high-accuracy
 * relative time, while CLOCK_REALTIME provides a low-accuracy wall time.
 */
int clock_gettime(clockid_t clock_id, struct timespec *tp)
{
	int rc = 0;

	if (clock_id == CLOCK_MONOTONIC)
	{
		static LARGE_INTEGER freq = {{0,0}};
		LARGE_INTEGER counts;

		QueryPerformanceCounter(&counts);
		if (freq.QuadPart == 0)
			QueryPerformanceFrequency(&freq);

		tp->tv_sec = counts.QuadPart / freq.QuadPart;
		/* Get the difference between the number of ns stored
		 * in 'tv_sec' and that stored in 'counts' */
		uint64_t t = tp->tv_sec * freq.QuadPart;
		t = counts.QuadPart - t;
		/* 't' now contains the number of cycles since the last second.
		 * We want the number of nanoseconds, so multiply out by 1,000,000,000
		 * and then divide by the frequency. */
		t *= 1000000000;
		tp->tv_nsec = t / freq.QuadPart;
	}
	else if (clock_id == CLOCK_REALTIME)
	{
		/* clock_gettime(CLOCK_REALTIME,...) is just an alias for gettimeofday with a
		 * higher-precision field. */
		struct timeval tv;
		gettimeofday(&tv, NULL);
		tp->tv_sec = tv.tv_sec;
		tp->tv_nsec = tv.tv_usec * 1000;
	} else {
		errno = EINVAL;
		rc = -1;
	}

	return rc;
}

int mlock(const void * addr, size_t len)
{
	return !VirtualLock((LPVOID)addr, len);
}

int munlock(const void * addr, size_t len)
{
	return !VirtualUnlock((LPVOID)addr, len);
}

pid_t waitpid(pid_t pid, int *stat_loc, int options)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return -1;
}

int usleep(useconds_t useconds)
{
	Sleep(useconds / 1000);
	return 0;
}

char *basename(char *path)
{
	static char name[MAX_PATH];
	int i;

	if (path == NULL || strlen(path) == 0)
		return (char*)".";

	i = strlen(path) - 1;

	while (path[i] != '\\' && path[i] != '/' && i >= 0)
		i--;

	strncpy(name, path + i + 1, MAX_PATH);

	return name;
}

int posix_fallocate(int fd, off_t offset, off_t len)
{
	const int BUFFER_SIZE = 64 * 1024 * 1024;
	int rc = 0;
	char *buf;
	unsigned int write_len;
	unsigned int bytes_written;
	off_t bytes_remaining = len;

	if (len == 0 || offset < 0)
		return EINVAL;

	buf = malloc(BUFFER_SIZE);

	if (buf == NULL)
		return ENOMEM;

	memset(buf, 0, BUFFER_SIZE);

	int64_t prev_pos = _telli64(fd);

	if (_lseeki64(fd, offset, SEEK_SET) == -1)
		return errno;

	while (bytes_remaining > 0) {
		if (bytes_remaining < BUFFER_SIZE)
			write_len = (unsigned int)bytes_remaining;
		else
			write_len = BUFFER_SIZE;

		bytes_written = _write(fd, buf, write_len);
		if (bytes_written == -1) {
			rc = errno;
			break;
		}

		bytes_remaining -= bytes_written;
	}

	free(buf);
	_lseeki64(fd, prev_pos, SEEK_SET);
	return rc;
}

int ftruncate(int fildes, off_t length)
{
	BOOL bSuccess;
	int64_t prev_pos = _telli64(fildes);
	_lseeki64(fildes, length, SEEK_SET);
	HANDLE hFile = (HANDLE)_get_osfhandle(fildes);
	bSuccess = SetEndOfFile(hFile);
	_lseeki64(fildes, prev_pos, SEEK_SET);
	return !bSuccess;
}

int fsync(int fildes)
{
	HANDLE hFile = (HANDLE)_get_osfhandle(fildes);
	return !FlushFileBuffers(hFile);
}

int nFileMappings = 0;
HANDLE fileMappings[1024];

int shmget(key_t key, size_t size, int shmflg)
{
	int mapid = -1;
	uint32_t size_low = size & 0xFFFFFFFF;
	uint32_t size_high = ((uint64_t)size) >> 32;
	HANDLE hMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, (PAGE_EXECUTE_READWRITE | SEC_RESERVE), size_high, size_low, NULL);
	if (hMapping != NULL) {
		fileMappings[nFileMappings] = hMapping;
		mapid = nFileMappings;
		nFileMappings++;
	} else {
		errno = ENOSYS;
	}

	return mapid;
}

void *shmat(int shmid, const void *shmaddr, int shmflg)
{
	void* mapAddr;
	MEMORY_BASIC_INFORMATION memInfo;
	mapAddr = MapViewOfFile(fileMappings[shmid], FILE_MAP_ALL_ACCESS, 0, 0, 0);
	VirtualQuery(mapAddr, &memInfo, sizeof(memInfo));
	mapAddr = VirtualAlloc(mapAddr, memInfo.RegionSize, MEM_COMMIT, PAGE_READWRITE);
	return mapAddr;
}

int shmdt(const void *shmaddr)
{
	return !UnmapViewOfFile(shmaddr);
}

int shmctl(int shmid, int cmd, struct shmid_ds *buf)
{
	if (cmd == IPC_RMID) {
		fileMappings[shmid] = INVALID_HANDLE_VALUE;
		return 0;
	} else {
		log_err("%s is not implemented\n", __func__);
	}
	return (-1);
}

int setuid(uid_t uid)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

int setgid(gid_t gid)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

int nice(int incr)
{
	if (incr != 0) {
		errno = EINVAL;
		return -1;
	}

	return 0;
}

int getrusage(int who, struct rusage *r_usage)
{
	const uint64_t SECONDS_BETWEEN_1601_AND_1970 = 11644473600;
	FILETIME cTime, eTime, kTime, uTime;
	time_t time;

	memset(r_usage, 0, sizeof(*r_usage));

	HANDLE hProcess = GetCurrentProcess();
	GetProcessTimes(hProcess, &cTime, &eTime, &kTime, &uTime);
	time = ((uint64_t)uTime.dwHighDateTime << 32) + uTime.dwLowDateTime;
	/* Divide by 10,000,000 to get the number of seconds and move the epoch from
	 * 1601 to 1970 */
	time = (time_t)(((time)/10000000) - SECONDS_BETWEEN_1601_AND_1970);
	r_usage->ru_utime.tv_sec = time;
	/* getrusage() doesn't care about anything other than seconds, so set tv_usec to 0 */
	r_usage->ru_utime.tv_usec = 0;
	time = ((uint64_t)kTime.dwHighDateTime << 32) + kTime.dwLowDateTime;
	/* Divide by 10,000,000 to get the number of seconds and move the epoch from
	 * 1601 to 1970 */
	time = (time_t)(((time)/10000000) - SECONDS_BETWEEN_1601_AND_1970);
	r_usage->ru_stime.tv_sec = time;
	r_usage->ru_stime.tv_usec = 0;
	return 0;
}

int posix_madvise(void *addr, size_t len, int advice)
{
	log_err("%s is not implemented\n", __func__);
	return ENOSYS;
}

/* Windows doesn't support advice for memory pages. Just ignore it. */
int msync(void *addr, size_t len, int flags)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return -1;
}

int fdatasync(int fildes)
{
	return fsync(fildes);
}

ssize_t pwrite(int fildes, const void *buf, size_t nbyte,
		off_t offset)
{
	int64_t pos = _telli64(fildes);
	ssize_t len = _write(fildes, buf, nbyte);
	_lseeki64(fildes, pos, SEEK_SET);
	return len;
}

ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset)
{
	int64_t pos = _telli64(fildes);
	ssize_t len = read(fildes, buf, nbyte);
	_lseeki64(fildes, pos, SEEK_SET);
	return len;
}

ssize_t readv(int fildes, const struct iovec *iov, int iovcnt)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

ssize_t writev(int fildes, const struct iovec *iov, int iovcnt)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return (-1);
}

long long strtoll(const char *restrict str, char **restrict endptr,
		int base)
{
	return _strtoi64(str, endptr, base);
}

char *strsep(char **stringp, const char *delim)
{
	char *orig = *stringp;
	BOOL gotMatch = FALSE;
	int i = 0;
	int j = 0;

	if (*stringp == NULL)
		return NULL;

	while ((*stringp)[i] != '\0') {
		j = 0;
		while (delim[j] != '\0') {
			if ((*stringp)[i] == delim[j]) {
				gotMatch = TRUE;
				(*stringp)[i] = '\0';
				*stringp = *stringp + i + 1;
				break;
			}
			j++;
		}
		if (gotMatch)
			break;

		i++;
	}

	if (!gotMatch)
		*stringp = NULL;

	return orig;
}

int poll(struct pollfd fds[], nfds_t nfds, int timeout)
{
	struct timeval tv;
	struct timeval *to = NULL;
	fd_set readfds, writefds, exceptfds;
	int i;
	int rc;

	if (timeout != -1)
		to = &tv;

	to->tv_sec = timeout / 1000;
	to->tv_usec = (timeout % 1000) * 1000;

	FD_ZERO(&readfds);
	FD_ZERO(&writefds);
	FD_ZERO(&exceptfds);

	for (i = 0; i < nfds; i++)
	{
		if (fds[i].fd < 0) {
			fds[i].revents = 0;
			continue;
		}

		if (fds[i].events & POLLIN)
			FD_SET(fds[i].fd, &readfds);

		if (fds[i].events & POLLOUT)
			FD_SET(fds[i].fd, &writefds);

		FD_SET(fds[i].fd, &exceptfds);
	}

	rc = select(nfds, &readfds, &writefds, &exceptfds, to);

	if (rc != SOCKET_ERROR) {
		for (i = 0; i < nfds; i++)
		{
			if (fds[i].fd < 0) {
				continue;
			}

			if ((fds[i].events & POLLIN) && FD_ISSET(fds[i].fd, &readfds))
				fds[i].revents |= POLLIN;

			if ((fds[i].events & POLLOUT) && FD_ISSET(fds[i].fd, &writefds))
				fds[i].revents |= POLLOUT;

			if (FD_ISSET(fds[i].fd, &exceptfds))
				fds[i].revents |= POLLHUP;
		}
	}

	return rc;
}

int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
{
	struct timeval tv;
	DWORD ms_remaining;
	DWORD ms_total = (rqtp->tv_sec * 1000) + (rqtp->tv_nsec / 1000000.0);

	if (ms_total == 0)
		ms_total = 1;

	ms_remaining = ms_total;

	/* Since Sleep() can sleep for less than the requested time, add a loop to
	   ensure we only return after the requested length of time has elapsed */
	do {
		fio_gettime(&tv, NULL);
		Sleep(ms_remaining);
		ms_remaining = ms_total - mtime_since_now(&tv);
	} while (ms_remaining > 0 && ms_remaining < ms_total);

	/* this implementation will never sleep for less than the requested time */
	if (rmtp != NULL) {
		rmtp->tv_sec = 0;
		rmtp->tv_nsec = 0;
	}

	return 0;
}

DIR *opendir(const char *dirname)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return NULL;
}

int closedir(DIR *dirp)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return -1;
}

struct dirent *readdir(DIR *dirp)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return NULL;
}

uid_t geteuid(void)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return -1;
}

int inet_aton(char *addr)
{
	log_err("%s is not implemented\n", __func__);
	errno = ENOSYS;
	return 0;
}

const char* inet_ntop(int af, const void *restrict src,
		char *restrict dst, socklen_t size)
{
	INT status = SOCKET_ERROR;
	WSADATA wsd;
	char *ret = NULL;

	if (af != AF_INET && af != AF_INET6) {
		errno = EAFNOSUPPORT;
		return NULL;
	}

	WSAStartup(MAKEWORD(2,2), &wsd);

	if (af == AF_INET) {
		struct sockaddr_in si;
		DWORD len = size;
		memset(&si, 0, sizeof(si));
		si.sin_family = af;
		memcpy(&si.sin_addr, src, sizeof(si.sin_addr));
		status = WSAAddressToString((struct sockaddr*)&si, sizeof(si), NULL, dst, &len);
	} else if (af == AF_INET6) {
		struct sockaddr_in6 si6;
		DWORD len = size;
		memset(&si6, 0, sizeof(si6));
		si6.sin6_family = af;
		memcpy(&si6.sin6_addr, src, sizeof(si6.sin6_addr));
		status = WSAAddressToString((struct sockaddr*)&si6, sizeof(si6), NULL, dst, &len);
	}

	if (status != SOCKET_ERROR)
		ret = dst;
	else
		errno = ENOSPC;

	WSACleanup();
	return ret;
}

int inet_pton(int af, const char *restrict src, void *restrict dst)
{
	INT status = SOCKET_ERROR;
	WSADATA wsd;
	int ret = 1;

	if (af != AF_INET && af != AF_INET6) {
		errno = EAFNOSUPPORT;
		return -1;
	}

	WSAStartup(MAKEWORD(2,2), &wsd);

	if (af == AF_INET) {
		struct sockaddr_in si;
		INT len = sizeof(si);
		memset(&si, 0, sizeof(si));
		si.sin_family = af;
		status = WSAStringToAddressA((char*)src, af, NULL, (struct sockaddr*)&si, &len);
		if (status != SOCKET_ERROR)
			memcpy(dst, &si.sin_addr, sizeof(si.sin_addr));
	} else if (af == AF_INET6) {
		struct sockaddr_in6 si6;
		INT len = sizeof(si6);
		memset(&si6, 0, sizeof(si6));
		si6.sin6_family = af;
		status = WSAStringToAddressA((char*)src, af, NULL, (struct sockaddr*)&si6, &len);
		if (status != SOCKET_ERROR)
			memcpy(dst, &si6.sin6_addr, sizeof(si6.sin6_addr));
	}

	if (status == SOCKET_ERROR) {
		errno = ENOSPC;
		ret = 0;
	}

	WSACleanup();

	return ret;
}
Commit	Line	Data
9277ec14 BC	1	/* This file contains functions which implement those POSIX and Linux functions
	2	* that MinGW and Microsoft don't provide. The implementations contain just enough
	3	* functionality to support fio.
	4	*/
	5
	6	#include <arpa/inet.h>
	7	#include <netinet/in.h>
	8	#include <windows.h>
	9	#include <stddef.h>
	10	#include <stdlib.h>
	11	#include <unistd.h>
	12	#include <dirent.h>
	13	#include <pthread.h>
	14	#include <semaphore.h>
	15	#include <sys/shm.h>
	16	#include <sys/mman.h>
	17	#include <sys/uio.h>
	18	#include <sys/resource.h>
	19	#include <sys/poll.h>
	20
	21	#include "../os-windows.h"
	22
21c75387 BC	23	extern unsigned long mtime_since_now(struct timeval *);
	24	extern void fio_gettime(struct timeval , void );
	25
9277ec14 BC	26	long sysconf(int name)
	27	{
	28	long long val = -1;
	29	DWORD len;
	30	SYSTEM_LOGICAL_PROCESSOR_INFORMATION processorInfo;
	31	SYSTEM_INFO sysInfo;
	32	MEMORYSTATUSEX status;
	33
	34	switch (name)
	35	{
	36	case _SC_NPROCESSORS_ONLN:
	37	len = sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
	38	GetLogicalProcessorInformation(&processorInfo, &len);
	39	val = len / sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
	40	break;
	41
	42	case _SC_PAGESIZE:
	43	GetSystemInfo(&sysInfo);
	44	val = sysInfo.dwPageSize;
	45	break;
	46
	47	case _SC_PHYS_PAGES:
	48	status.dwLength = sizeof(status);
	49	GlobalMemoryStatusEx(&status);
	50	val = status.ullTotalPhys;
	51	break;
	52	default:
	53	log_err("sysconf(%d) is not implemented\n", name);
	54	break;
	55	}
	56
	57	return val;
	58	}
	59
	60	char *dl_error = NULL;
	61
	62	int dlclose(void *handle)
	63	{
	64	return !FreeLibrary((HMODULE)handle);
	65	}
	66
	67	void dlopen(const char file, int mode)
	68	{
	69	HMODULE hMod;
	70
	71	hMod = LoadLibrary(file);
	72	if (hMod == INVALID_HANDLE_VALUE)
	73	dl_error = (char*)"LoadLibrary failed";
	74	else
	75	dl_error = NULL;
	76
	77	return hMod;
	78	}
	79
	80	void dlsym(void handle, const char *name)
	81	{
	82	FARPROC fnPtr;
	83
	84	fnPtr = GetProcAddress((HMODULE)handle, name);
	85	if (fnPtr == NULL)
	86	dl_error = (char*)"GetProcAddress failed";
	87	else
	88	dl_error = NULL;
	89
90	return fnPtr;
91	}
92
93	char *dlerror(void)
94	{
95	return dl_error;
96	}
97
98	int gettimeofday(struct timeval restrict tp, void restrict tzp)
99	{
100	FILETIME fileTime;
9576f613 BC	101	uint64_t unix_time, windows_time;
9576f613 BC	102	const uint64_t MILLISECONDS_BETWEEN_1601_AND_1970 = 11644473600000;
9277ec14	103
fc0b830f	104	/* Ignore the timezone parameter */
9277ec14 BC	105	(void)tzp;
	106
	107	/*
	108	* Windows time is stored as the number 100 ns intervals since January 1 1601.
	109	* Conversion details from http://www.informit.com/articles/article.aspx?p=102236&seqNum=3
	110	* Its precision is 100 ns but accuracy is only one clock tick, or normally around 15 ms.
	111	*/
	112	GetSystemTimeAsFileTime(&fileTime);
9576f613	113	windows_time = ((uint64_t)fileTime.dwHighDateTime << 32) + fileTime.dwLowDateTime;
9277ec14 BC	114	/* Divide by 10,000 to convert to ms and subtract the time between 1601 and 1970 */
	115	unix_time = (((windows_time)/10000) - MILLISECONDS_BETWEEN_1601_AND_1970);
	116	/* unix_time is now the number of milliseconds since 1970 (the Unix epoch) */
	117	tp->tv_sec = unix_time / 1000;
	118	tp->tv_usec = (unix_time % 1000) * 1000;
	119	return 0;
	120	}
	121
	122	void syslog(int priority, const char message, ... / argument */)
	123	{
	124	log_err("%s is not implemented\n", __func__);
	125	}
	126
	127	int sigaction(int sig, const struct sigaction *act,
	128	struct sigaction *oact)
	129	{
e5b8f91c BC	130	int rc = 0;
	131	void (*prev_handler)(int);
	132
	133	prev_handler = signal(sig, act->sa_handler);
	134	if (oact != NULL)
	135	oact->sa_handler = prev_handler;
	136
	137	if (prev_handler == SIG_ERR)
	138	rc = -1;
	139
	140	return rc;
9277ec14 BC	141	}
	142
	143	int lstat(const char * path, struct stat * buf)
	144	{
	145	return stat(path, buf);
	146	}
	147
	148	void mmap(void addr, size_t len, int prot, int flags,
	149	int fildes, off_t off)
	150	{
	151	DWORD vaProt = 0;
	152	void* allocAddr = NULL;
	153
	154	if (prot & PROT_NONE)
	155	vaProt \|= PAGE_NOACCESS;
	156
	157	if ((prot & PROT_READ) && !(prot & PROT_WRITE))
	158	vaProt \|= PAGE_READONLY;
	159
	160	if (prot & PROT_WRITE)
	161	vaProt \|= PAGE_READWRITE;
	162
	163	if ((flags & MAP_ANON) \| (flags & MAP_ANONYMOUS))
	164	{
	165	allocAddr = VirtualAlloc(addr, len, MEM_COMMIT, vaProt);
	166	}
	167
	168	return allocAddr;
	169	}
	170
	171	int munmap(void *addr, size_t len)
	172	{
	173	return !VirtualFree(addr, 0, MEM_RELEASE);
	174	}
	175
	176	int fork(void)
	177	{
	178	log_err("%s is not implemented\n", __func__);
	179	errno = ENOSYS;
	180	return (-1);
	181	}
	182
	183	pid_t setsid(void)
	184	{
	185	log_err("%s is not implemented\n", __func__);
	186	errno = ENOSYS;
	187	return (-1);
	188	}
	189
	190	void openlog(const char *ident, int logopt, int facility)
	191	{
	192	log_err("%s is not implemented\n", __func__);
	193	}
	194
	195	void closelog(void)
	196	{
	197	log_err("%s is not implemented\n", __func__);
	198	}
	199
	200	int kill(pid_t pid, int sig)
	201	{
	202	errno = ESRCH;
	203	return (-1);
	204	}
205
fc0b830f BC	206	/*
	207	* This is assumed to be used only by the network code,
	208	* and so doesn't try and handle any of the other cases
	209	*/
9277ec14 BC	210	int fcntl(int fildes, int cmd, ...)
9277ec14 BC	211	{
fc0b830f BC	212	/*
	213	* non-blocking mode doesn't work the same as in BSD sockets,
	214	* so ignore it.
	215	*/
9277ec14 BC	216	#if 0
	217	va_list ap;
	218	int val, opt, status;
	219
	220	if (cmd == F_GETFL)
	221	return 0;
	222	else if (cmd != F_SETFL) {
	223	errno = EINVAL;
	224	return (-1);
	225	}
	226
	227	va_start(ap, 1);
	228
	229	opt = va_arg(ap, int);
	230	if (opt & O_NONBLOCK)
	231	val = 1;
	232	else
	233	val = 0;
	234
	235	status = ioctlsocket((SOCKET)fildes, opt, &val);
	236
	237	if (status == SOCKET_ERROR) {
	238	errno = EINVAL;
	239	val = -1;
	240	}
	241
	242	va_end(ap);
	243
	244	return val;
	245	#endif
	246	return 0;
	247	}
	248
	249	/*
	250	* Get the value of a local clock source.
	251	* This implementation supports 2 clocks: CLOCK_MONOTONIC provides high-accuracy
	252	* relative time, while CLOCK_REALTIME provides a low-accuracy wall time.
	253	*/
	254	int clock_gettime(clockid_t clock_id, struct timespec *tp)
	255	{
	256	int rc = 0;
	257
	258	if (clock_id == CLOCK_MONOTONIC)
	259	{
	260	static LARGE_INTEGER freq = {{0,0}};
	261	LARGE_INTEGER counts;
	262
	263	QueryPerformanceCounter(&counts);
	264	if (freq.QuadPart == 0)
	265	QueryPerformanceFrequency(&freq);
	266
	267	tp->tv_sec = counts.QuadPart / freq.QuadPart;
	268	/* Get the difference between the number of ns stored
	269	* in 'tv_sec' and that stored in 'counts' */
9576f613	270	uint64_t t = tp->tv_sec * freq.QuadPart;
9277ec14 BC	271	t = counts.QuadPart - t;
	272	/* 't' now contains the number of cycles since the last second.
	273	* We want the number of nanoseconds, so multiply out by 1,000,000,000
	274	* and then divide by the frequency. */
	275	t *= 1000000000;
	276	tp->tv_nsec = t / freq.QuadPart;
	277	}
	278	else if (clock_id == CLOCK_REALTIME)
	279	{
	280	/* clock_gettime(CLOCK_REALTIME,...) is just an alias for gettimeofday with a
	281	* higher-precision field. */
	282	struct timeval tv;
	283	gettimeofday(&tv, NULL);
	284	tp->tv_sec = tv.tv_sec;
	285	tp->tv_nsec = tv.tv_usec * 1000;
	286	} else {
	287	errno = EINVAL;
	288	rc = -1;
	289	}
	290
	291	return rc;
	292	}
	293
	294	int mlock(const void * addr, size_t len)
	295	{
	296	return !VirtualLock((LPVOID)addr, len);
	297	}
	298
	299	int munlock(const void * addr, size_t len)
	300	{
	301	return !VirtualUnlock((LPVOID)addr, len);
	302	}
	303
	304	pid_t waitpid(pid_t pid, int *stat_loc, int options)
	305	{
	306	log_err("%s is not implemented\n", __func__);
	307	errno = ENOSYS;
	308	return -1;
	309	}
	310
	311	int usleep(useconds_t useconds)
	312	{
	313	Sleep(useconds / 1000);
	314	return 0;
	315	}
	316
	317	char basename(char path)
	318	{
	319	static char name[MAX_PATH];
	320	int i;
	321
	322	if (path == NULL \|\| strlen(path) == 0)
	323	return (char*)".";
	324
	325	i = strlen(path) - 1;
	326
9576f613	327	while (path[i] != '\\' && path[i] != '/' && i >= 0)
9277ec14 BC	328	i--;
9277ec14 BC	329
9576f613	330	strncpy(name, path + i + 1, MAX_PATH);
9277ec14 BC	331
	332	return name;
	333	}
	334
	335	int posix_fallocate(int fd, off_t offset, off_t len)
	336	{
9576f613	337	const int BUFFER_SIZE = 64 * 1024 * 1024;
f9a58c2a BC	338	int rc = 0;
	339	char *buf;
	340	unsigned int write_len;
	341	unsigned int bytes_written;
	342	off_t bytes_remaining = len;
	343
	344	if (len == 0 \|\| offset < 0)
	345	return EINVAL;
	346
	347	buf = malloc(BUFFER_SIZE);
	348
	349	if (buf == NULL)
	350	return ENOMEM;
	351
	352	memset(buf, 0, BUFFER_SIZE);
	353
9576f613 BC	354	int64_t prev_pos = _telli64(fd);
	355
	356	if (_lseeki64(fd, offset, SEEK_SET) == -1)
f9a58c2a BC	357	return errno;
	358
	359	while (bytes_remaining > 0) {
	360	if (bytes_remaining < BUFFER_SIZE)
	361	write_len = (unsigned int)bytes_remaining;
	362	else
	363	write_len = BUFFER_SIZE;
	364
	365	bytes_written = _write(fd, buf, write_len);
	366	if (bytes_written == -1) {
	367	rc = errno;
	368	break;
	369	}
	370
	371	bytes_remaining -= bytes_written;
	372	}
	373
	374	free(buf);
9576f613	375	_lseeki64(fd, prev_pos, SEEK_SET);
f9a58c2a	376	return rc;
9277ec14 BC	377	}
	378
	379	int ftruncate(int fildes, off_t length)
	380	{
	381	BOOL bSuccess;
9576f613 BC	382	int64_t prev_pos = _telli64(fildes);
9576f613 BC	383	_lseeki64(fildes, length, SEEK_SET);
9277ec14 BC	384	HANDLE hFile = (HANDLE)_get_osfhandle(fildes);
9277ec14 BC	385	bSuccess = SetEndOfFile(hFile);
9576f613	386	_lseeki64(fildes, prev_pos, SEEK_SET);
9277ec14 BC	387	return !bSuccess;
	388	}
	389
	390	int fsync(int fildes)
	391	{
	392	HANDLE hFile = (HANDLE)_get_osfhandle(fildes);
	393	return !FlushFileBuffers(hFile);
	394	}
	395
	396	int nFileMappings = 0;
	397	HANDLE fileMappings[1024];
	398
	399	int shmget(key_t key, size_t size, int shmflg)
	400	{
	401	int mapid = -1;
d3987946 BC	402	uint32_t size_low = size & 0xFFFFFFFF;
	403	uint32_t size_high = ((uint64_t)size) >> 32;
	404	HANDLE hMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, (PAGE_EXECUTE_READWRITE \| SEC_RESERVE), size_high, size_low, NULL);
9277ec14 BC	405	if (hMapping != NULL) {
	406	fileMappings[nFileMappings] = hMapping;
	407	mapid = nFileMappings;
	408	nFileMappings++;
	409	} else {
	410	errno = ENOSYS;
	411	}
	412
	413	return mapid;
	414	}
	415
	416	void shmat(int shmid, const void shmaddr, int shmflg)
	417	{
	418	void* mapAddr;
	419	MEMORY_BASIC_INFORMATION memInfo;
	420	mapAddr = MapViewOfFile(fileMappings[shmid], FILE_MAP_ALL_ACCESS, 0, 0, 0);
	421	VirtualQuery(mapAddr, &memInfo, sizeof(memInfo));
	422	mapAddr = VirtualAlloc(mapAddr, memInfo.RegionSize, MEM_COMMIT, PAGE_READWRITE);
	423	return mapAddr;
	424	}
	425
	426	int shmdt(const void *shmaddr)
	427	{
	428	return !UnmapViewOfFile(shmaddr);
	429	}
	430
	431	int shmctl(int shmid, int cmd, struct shmid_ds *buf)
	432	{
	433	if (cmd == IPC_RMID) {
	434	fileMappings[shmid] = INVALID_HANDLE_VALUE;
	435	return 0;
	436	} else {
	437	log_err("%s is not implemented\n", __func__);
	438	}
	439	return (-1);
	440	}
	441
	442	int setuid(uid_t uid)
	443	{
	444	log_err("%s is not implemented\n", __func__);
	445	errno = ENOSYS;
	446	return (-1);
	447	}
	448
	449	int setgid(gid_t gid)
	450	{
	451	log_err("%s is not implemented\n", __func__);
	452	errno = ENOSYS;
	453	return (-1);
	454	}
	455
	456	int nice(int incr)
	457	{
	458	if (incr != 0) {
	459	errno = EINVAL;
	460	return -1;
	461	}
	462
	463	return 0;
	464	}
	465
	466	int getrusage(int who, struct rusage *r_usage)
	467	{
9576f613	468	const uint64_t SECONDS_BETWEEN_1601_AND_1970 = 11644473600;
9277ec14 BC	469	FILETIME cTime, eTime, kTime, uTime;
	470	time_t time;
	471
	472	memset(r_usage, 0, sizeof(*r_usage));
	473
	474	HANDLE hProcess = GetCurrentProcess();
	475	GetProcessTimes(hProcess, &cTime, &eTime, &kTime, &uTime);
9576f613	476	time = ((uint64_t)uTime.dwHighDateTime << 32) + uTime.dwLowDateTime;
9277ec14 BC	477	/* Divide by 10,000,000 to get the number of seconds and move the epoch from
	478	* 1601 to 1970 */
	479	time = (time_t)(((time)/10000000) - SECONDS_BETWEEN_1601_AND_1970);
	480	r_usage->ru_utime.tv_sec = time;
	481	/* getrusage() doesn't care about anything other than seconds, so set tv_usec to 0 */
	482	r_usage->ru_utime.tv_usec = 0;
9576f613	483	time = ((uint64_t)kTime.dwHighDateTime << 32) + kTime.dwLowDateTime;
9277ec14 BC	484	/* Divide by 10,000,000 to get the number of seconds and move the epoch from
	485	* 1601 to 1970 */
	486	time = (time_t)(((time)/10000000) - SECONDS_BETWEEN_1601_AND_1970);
	487	r_usage->ru_stime.tv_sec = time;
	488	r_usage->ru_stime.tv_usec = 0;
	489	return 0;
	490	}
	491
	492	int posix_madvise(void *addr, size_t len, int advice)
	493	{
	494	log_err("%s is not implemented\n", __func__);
	495	return ENOSYS;
	496	}
	497
fc0b830f	498	/* Windows doesn't support advice for memory pages. Just ignore it. */
9277ec14 BC	499	int msync(void *addr, size_t len, int flags)
	500	{
	501	log_err("%s is not implemented\n", __func__);
	502	errno = ENOSYS;
	503	return -1;
	504	}
	505
	506	int fdatasync(int fildes)
	507	{
	508	return fsync(fildes);
	509	}
	510
	511	ssize_t pwrite(int fildes, const void *buf, size_t nbyte,
	512	off_t offset)
	513	{
9576f613 BC	514	int64_t pos = _telli64(fildes);
	515	ssize_t len = _write(fildes, buf, nbyte);
	516	_lseeki64(fildes, pos, SEEK_SET);
9277ec14 BC	517	return len;
	518	}
	519
	520	ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset)
	521	{
9576f613	522	int64_t pos = _telli64(fildes);
9277ec14	523	ssize_t len = read(fildes, buf, nbyte);
9576f613	524	_lseeki64(fildes, pos, SEEK_SET);
9277ec14 BC	525	return len;
	526	}
	527
	528	ssize_t readv(int fildes, const struct iovec *iov, int iovcnt)
	529	{
	530	log_err("%s is not implemented\n", __func__);
	531	errno = ENOSYS;
	532	return (-1);
	533	}
	534
	535	ssize_t writev(int fildes, const struct iovec *iov, int iovcnt)
	536	{
	537	log_err("%s is not implemented\n", __func__);
	538	errno = ENOSYS;
	539	return (-1);
	540	}
	541
	542	long long strtoll(const char restrict str, char *restrict endptr,
	543	int base)
	544	{
	545	return _strtoi64(str, endptr, base);
	546	}
	547
	548	char strsep(char stringp, const char delim)
	549	{
	550	char orig = stringp;
	551	BOOL gotMatch = FALSE;
	552	int i = 0;
	553	int j = 0;
	554
	555	if (*stringp == NULL)
	556	return NULL;
	557
	558	while ((*stringp)[i] != '\0') {
	559	j = 0;
	560	while (delim[j] != '\0') {
	561	if ((*stringp)[i] == delim[j]) {
	562	gotMatch = TRUE;
	563	(*stringp)[i] = '\0';
	564	stringp = stringp + i + 1;
	565	break;
	566	}
	567	j++;
	568	}
	569	if (gotMatch)
	570	break;
	571
	572	i++;
	573	}
	574
	575	if (!gotMatch)
	576	*stringp = NULL;
	577
	578	return orig;
	579	}
	580
	581	int poll(struct pollfd fds[], nfds_t nfds, int timeout)
	582	{
	583	struct timeval tv;
	584	struct timeval *to = NULL;
	585	fd_set readfds, writefds, exceptfds;
	586	int i;
	587	int rc;
	588
589	if (timeout != -1)
f9a58c2a	590	to = &tv;
9277ec14 BC	591
	592	to->tv_sec = timeout / 1000;
	593	to->tv_usec = (timeout % 1000) * 1000;
	594
	595	FD_ZERO(&readfds);
	596	FD_ZERO(&writefds);
	597	FD_ZERO(&exceptfds);
	598
	599	for (i = 0; i < nfds; i++)
	600	{
	601	if (fds[i].fd < 0) {
	602	fds[i].revents = 0;
	603	continue;
	604	}
	605
	606	if (fds[i].events & POLLIN)
	607	FD_SET(fds[i].fd, &readfds);
	608
	609	if (fds[i].events & POLLOUT)
	610	FD_SET(fds[i].fd, &writefds);
	611
f9a58c2a	612	FD_SET(fds[i].fd, &exceptfds);
9277ec14 BC	613	}
	614
	615	rc = select(nfds, &readfds, &writefds, &exceptfds, to);
	616
	617	if (rc != SOCKET_ERROR) {
	618	for (i = 0; i < nfds; i++)
	619	{
	620	if (fds[i].fd < 0) {
	621	continue;
	622	}
	623
	624	if ((fds[i].events & POLLIN) && FD_ISSET(fds[i].fd, &readfds))
	625	fds[i].revents \|= POLLIN;
	626
	627	if ((fds[i].events & POLLOUT) && FD_ISSET(fds[i].fd, &writefds))
	628	fds[i].revents \|= POLLOUT;
	629
	630	if (FD_ISSET(fds[i].fd, &exceptfds))
	631	fds[i].revents \|= POLLHUP;
	632	}
	633	}
	634
	635	return rc;
	636	}
	637
	638	int nanosleep(const struct timespec rqtp, struct timespec rmtp)
	639	{
21c75387 BC	640	struct timeval tv;
	641	DWORD ms_remaining;
	642	DWORD ms_total = (rqtp->tv_sec * 1000) + (rqtp->tv_nsec / 1000000.0);
	643
	644	if (ms_total == 0)
	645	ms_total = 1;
	646
	647	ms_remaining = ms_total;
	648
	649	/* Since Sleep() can sleep for less than the requested time, add a loop to
	650	ensure we only return after the requested length of time has elapsed */
	651	do {
	652	fio_gettime(&tv, NULL);
	653	Sleep(ms_remaining);
	654	ms_remaining = ms_total - mtime_since_now(&tv);
	655	} while (ms_remaining > 0 && ms_remaining < ms_total);
	656
	657	/* this implementation will never sleep for less than the requested time */
	658	if (rmtp != NULL) {
	659	rmtp->tv_sec = 0;
	660	rmtp->tv_nsec = 0;
	661	}
	662
	663	return 0;
9277ec14 BC	664	}
	665
	666	DIR opendir(const char dirname)
	667	{
	668	log_err("%s is not implemented\n", __func__);
	669	errno = ENOSYS;
	670	return NULL;
	671	}
	672
	673	int closedir(DIR *dirp)
	674	{
	675	log_err("%s is not implemented\n", __func__);
	676	errno = ENOSYS;
	677	return -1;
	678	}
	679
	680	struct dirent readdir(DIR dirp)
	681	{
	682	log_err("%s is not implemented\n", __func__);
	683	errno = ENOSYS;
	684	return NULL;
	685	}
	686
	687	uid_t geteuid(void)
	688	{
	689	log_err("%s is not implemented\n", __func__);
	690	errno = ENOSYS;
	691	return -1;
	692	}
	693
	694	int inet_aton(char *addr)
	695	{
	696	log_err("%s is not implemented\n", __func__);
	697	errno = ENOSYS;
	698	return 0;
	699	}
	700
	701	const char* inet_ntop(int af, const void *restrict src,
	702	char *restrict dst, socklen_t size)
	703	{
	704	INT status = SOCKET_ERROR;
	705	WSADATA wsd;
	706	char *ret = NULL;
	707
	708	if (af != AF_INET && af != AF_INET6) {
	709	errno = EAFNOSUPPORT;
	710	return NULL;
	711	}
	712
	713	WSAStartup(MAKEWORD(2,2), &wsd);
	714
	715	if (af == AF_INET) {
	716	struct sockaddr_in si;
	717	DWORD len = size;
	718	memset(&si, 0, sizeof(si));
	719	si.sin_family = af;
	720	memcpy(&si.sin_addr, src, sizeof(si.sin_addr));
	721	status = WSAAddressToString((struct sockaddr*)&si, sizeof(si), NULL, dst, &len);
	722	} else if (af == AF_INET6) {
	723	struct sockaddr_in6 si6;
	724	DWORD len = size;
	725	memset(&si6, 0, sizeof(si6));
	726	si6.sin6_family = af;
	727	memcpy(&si6.sin6_addr, src, sizeof(si6.sin6_addr));
728	status = WSAAddressToString((struct sockaddr*)&si6, sizeof(si6), NULL, dst, &len);
729	}
730
731	if (status != SOCKET_ERROR)
732	ret = dst;
733	else
734	errno = ENOSPC;
735
736	WSACleanup();
737	return ret;
738	}
739
740	int inet_pton(int af, const char restrict src, void restrict dst)
741	{
742	INT status = SOCKET_ERROR;
743	WSADATA wsd;
744	int ret = 1;
745
746	if (af != AF_INET && af != AF_INET6) {
747	errno = EAFNOSUPPORT;
748	return -1;
749	}
750
751	WSAStartup(MAKEWORD(2,2), &wsd);
752
753	if (af == AF_INET) {
754	struct sockaddr_in si;
755	INT len = sizeof(si);
756	memset(&si, 0, sizeof(si));
757	si.sin_family = af;
758	status = WSAStringToAddressA((char)src, af, NULL, (struct sockaddr)&si, &len);
759	if (status != SOCKET_ERROR)
760	memcpy(dst, &si.sin_addr, sizeof(si.sin_addr));
761	} else if (af == AF_INET6) {
762	struct sockaddr_in6 si6;
763	INT len = sizeof(si6);
764	memset(&si6, 0, sizeof(si6));
765	si6.sin6_family = af;
766	status = WSAStringToAddressA((char)src, af, NULL, (struct sockaddr)&si6, &len);
767	if (status != SOCKET_ERROR)
768	memcpy(dst, &si6.sin6_addr, sizeof(si6.sin6_addr));
769	}
770
771	if (status == SOCKET_ERROR) {
772	errno = ENOSPC;
773	ret = 0;
774	}
775
776	WSACleanup();
777
778	return ret;
779	}