mirrors/FreeRDP
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
7c5a2f4a3d
FreeRDP/winpr/libwinpr/synch/wait.c
Norbert Federa f71b6b46e8 fix string format specifiers 
- fixed invalid, missing or additional arguments
- removed all type casts from arguments
- added missing (void*) typecasts for %p arguments
- use inttypes defines where appropriate
2016-12-16 13:48:43 +01:00

559 lines
12 KiB
C
Raw Blame History

/**
* WinPR: Windows Portable Runtime
* Synchronization Functions
*
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2014 Hardening <contact@hardening-consulting.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#else
#ifndef _WIN32
#include <sys/select.h>
#endif
#endif
#include <assert.h>
#include <errno.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/platform.h>
#include "synch.h"
#include "../thread/thread.h"
#include <winpr/thread.h>
#include <winpr/debug.h>
#include "../log.h"
#define TAG WINPR_TAG("sync.wait")
/**
* WaitForSingleObject
* WaitForSingleObjectEx
* WaitForMultipleObjectsEx
* SignalObjectAndWait
*/
#ifndef _WIN32
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <sys/wait.h>
#include "../handle/handle.h"
#include "../pipe/pipe.h"
/* clock_gettime is not implemented on OSX prior to 10.12 */
#ifdef __MACH__
#include <mach/mach_time.h>
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 0
/* clock_gettime is not implemented on OSX prior to 10.12 */
int _mach_clock_gettime(int clk_id, struct timespec *t);
int
_mach_clock_gettime(int clk_id, struct timespec *t)
{
UINT64 time;
double seconds;
double nseconds;
mach_timebase_info_data_t timebase;
mach_timebase_info(&timebase);
time = mach_absolute_time();
nseconds = ((double) time * (double) timebase.numer) / ((double) timebase.denom);
seconds = ((double) time * (double) timebase.numer) / ((double) timebase.denom * 1e9);
t->tv_sec = seconds;
t->tv_nsec = nseconds;
return 0;
}
/* if clock_gettime is declared, then __CLOCK_AVAILABILITY will be defined */
#ifdef __CLOCK_AVAILABILITY
/* If we compiled with Mac OSX 10.12 or later, then clock_gettime will be declared
* * but it may be NULL at runtime. So we need to check before using it. */
int _mach_safe_clock_gettime(int clk_id, struct timespec *t);
int
_mach_safe_clock_gettime(int clk_id, struct timespec *t) {
if( clock_gettime ) {
return clock_gettime(clk_id, t);
}
return _mach_clock_gettime(clk_id, t);
}
#define clock_gettime _mach_safe_clock_gettime
#else
#define clock_gettime _mach_clock_gettime
#endif
#endif
static long long ts_difftime(const struct timespec *o,
const struct timespec *n)
{
long long oldValue = o->tv_sec * 1000000000LL + o->tv_nsec;
long long newValue = n->tv_sec * 1000000000LL + n->tv_nsec;
return newValue - oldValue;
}
/* Drop in replacement for pthread_mutex_timedlock
*/
#if !defined(HAVE_PTHREAD_MUTEX_TIMEDLOCK)
#include <pthread.h>
static int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *timeout)
{
struct timespec timenow;
struct timespec sleepytime;
unsigned long long diff;
int retcode;
/* This is just to avoid a completely busy wait */
clock_gettime(CLOCK_MONOTONIC, &timenow);
diff = ts_difftime(&timenow, timeout);
sleepytime.tv_sec = diff / 1000000000LL;
sleepytime.tv_nsec = diff % 1000000000LL;
while ((retcode = pthread_mutex_trylock(mutex)) == EBUSY)
{
clock_gettime(CLOCK_MONOTONIC, &timenow);
if (ts_difftime(timeout, &timenow) >= 0)
{
return ETIMEDOUT;
}
nanosleep(&sleepytime, NULL);
}
return retcode;
}
#endif
#ifdef HAVE_POLL_H
static DWORD handle_mode_to_pollevent(ULONG mode)
{
DWORD event = 0;
if (mode & WINPR_FD_READ)
event |= POLLIN;
if (mode & WINPR_FD_WRITE)
event |= POLLOUT;
return event;
}
#endif
static void ts_add_ms(struct timespec *ts, DWORD dwMilliseconds)
{
ts->tv_sec += dwMilliseconds / 1000L;
ts->tv_nsec += (dwMilliseconds % 1000L) * 1000000L;
ts->tv_sec += ts->tv_nsec / 1000000000L;
ts->tv_nsec = ts->tv_nsec % 1000000000L;
}
static int waitOnFd(int fd, ULONG mode, DWORD dwMilliseconds)
{
int status;
#ifdef HAVE_POLL_H
struct pollfd pollfds;
pollfds.fd = fd;
pollfds.events = handle_mode_to_pollevent(mode);
pollfds.revents = 0;
do
{
status = poll(&pollfds, 1, dwMilliseconds);
}
while ((status < 0) && (errno == EINTR));
#else
struct timeval timeout;
fd_set rfds, wfds;
fd_set* prfds = NULL;
fd_set* pwfds = NULL;
fd_set* pefds = NULL;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
FD_ZERO(&wfds);
FD_SET(fd, &wfds);
ZeroMemory(&timeout, sizeof(timeout));
if (mode & WINPR_FD_READ)
prfds = &rfds;
if (mode & WINPR_FD_WRITE)
pwfds = &wfds;
if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
{
timeout.tv_sec = dwMilliseconds / 1000;
timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
}
do
{
status = select(fd + 1, prfds, pwfds, pefds, (dwMilliseconds == INFINITE) ? NULL : &timeout);
}
while (status < 0 && (errno == EINTR));
#endif
return status;
}
DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds)
{
ULONG Type;
WINPR_HANDLE* Object;
if (!winpr_Handle_GetInfo(hHandle, &Type, &Object))
{
WLog_ERR(TAG, "invalid hHandle.");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
if (Type == HANDLE_TYPE_PROCESS)
{
WINPR_PROCESS *process;
process = (WINPR_PROCESS *) Object;
if (process->pid != waitpid(process->pid, &(process->status), 0))
{
WLog_ERR(TAG, "waitpid failure [%d] %s", errno, strerror(errno));
SetLastError(ERROR_INTERNAL_ERROR);
return WAIT_FAILED;
}
process->dwExitCode = (DWORD) process->status;
return WAIT_OBJECT_0;
}
else if (Type == HANDLE_TYPE_MUTEX)
{
WINPR_MUTEX *mutex;
mutex = (WINPR_MUTEX *) Object;
if (dwMilliseconds != INFINITE)
{
int status;
struct timespec timeout;
clock_gettime(CLOCK_MONOTONIC, &timeout);
ts_add_ms(&timeout, dwMilliseconds);
status = pthread_mutex_timedlock(&mutex->mutex, &timeout);
if (ETIMEDOUT == status)
return WAIT_TIMEOUT;
}
else
{
pthread_mutex_lock(&mutex->mutex);
}
return WAIT_OBJECT_0;
}
else
{
int status;
int fd = winpr_Handle_getFd(Object);
if (fd < 0)
{
WLog_ERR(TAG, "winpr_Handle_getFd did not return a fd!");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
status = waitOnFd(fd, Object->Mode, dwMilliseconds);
if (status < 0)
{
WLog_ERR(TAG, "waitOnFd() failure [%d] %s", errno, strerror(errno));
SetLastError(ERROR_INTERNAL_ERROR);
return WAIT_FAILED;
}
if (status != 1)
return WAIT_TIMEOUT;
return winpr_Handle_cleanup(Object);
}
SetLastError(ERROR_INTERNAL_ERROR);
return WAIT_FAILED;
}
DWORD WaitForSingleObjectEx(HANDLE hHandle, DWORD dwMilliseconds, BOOL bAlertable)
{
WLog_ERR(TAG, "%s: Not implemented.", __FUNCTION__);
SetLastError(ERROR_NOT_SUPPORTED);
return WAIT_FAILED;
}
DWORD WaitForMultipleObjects(DWORD nCount, const HANDLE *lpHandles, BOOL bWaitAll, DWORD dwMilliseconds)
{
struct timespec starttime;
struct timespec timenow;
unsigned long long diff;
DWORD signalled;
DWORD polled;
DWORD *poll_map = NULL;
BOOL *signalled_idx = NULL;
int fd = -1;
int index;
int status;
ULONG Type;
BOOL signal_handled = FALSE;
WINPR_HANDLE* Object;
#ifdef HAVE_POLL_H
struct pollfd *pollfds;
#else
int maxfd;
fd_set rfds;
fd_set wfds;
struct timeval timeout;
#endif
if (!nCount || (nCount > MAXIMUM_WAIT_OBJECTS))
{
WLog_ERR(TAG, "invalid handles count(%"PRIu32")", nCount);
return WAIT_FAILED;
}
if (bWaitAll)
{
signalled_idx = alloca(nCount * sizeof(BOOL));
memset(signalled_idx, FALSE, nCount * sizeof(BOOL));
poll_map = alloca(nCount * sizeof(DWORD));
memset(poll_map, 0, nCount * sizeof(DWORD));
}
#ifdef HAVE_POLL_H
pollfds = alloca(nCount * sizeof(struct pollfd));
#endif
signalled = 0;
do
{
#ifndef HAVE_POLL_H
fd_set* prfds = NULL;
fd_set* pwfds = NULL;
maxfd = 0;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
ZeroMemory(&timeout, sizeof(timeout));
#endif
if (bWaitAll && (dwMilliseconds != INFINITE))
clock_gettime(CLOCK_MONOTONIC, &starttime);
polled = 0;
for (index = 0; index < nCount; index++)
{
if (bWaitAll)
{
if (signalled_idx[index])
continue;
poll_map[polled] = index;
}
if (!winpr_Handle_GetInfo(lpHandles[index], &Type, &Object))
{
WLog_ERR(TAG, "invalid event file descriptor");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
fd = winpr_Handle_getFd(Object);
if (fd == -1)
{
WLog_ERR(TAG, "invalid file descriptor");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
#ifdef HAVE_POLL_H
pollfds[polled].fd = fd;
pollfds[polled].events = handle_mode_to_pollevent(Object->Mode);
pollfds[polled].revents = 0;
#else
FD_SET(fd, &rfds);
FD_SET(fd, &wfds);
if (Object->Mode & WINPR_FD_READ)
prfds = &rfds;
if (Object->Mode & WINPR_FD_WRITE)
pwfds = &wfds;
if (fd > maxfd)
maxfd = fd;
#endif
polled++;
}
#ifdef HAVE_POLL_H
do
{
status = poll(pollfds, polled, dwMilliseconds);
}
while (status < 0 && errno == EINTR);
#else
if ((dwMilliseconds != INFINITE) && (dwMilliseconds != 0))
{
timeout.tv_sec = dwMilliseconds / 1000;
timeout.tv_usec = (dwMilliseconds % 1000) * 1000;
}
do
{
status = select(maxfd + 1, prfds, pwfds, 0,
(dwMilliseconds == INFINITE) ? NULL : &timeout);
}
while (status < 0 && errno == EINTR);
#endif
if (status < 0)
{
#ifdef HAVE_POLL_H
WLog_ERR(TAG, "poll() handle %d (%"PRIu32") failure [%d] %s", index, nCount, errno,
strerror(errno));
#else
WLog_ERR(TAG, "select() handle %d (%"PRIu32") failure [%d] %s", index, nCount, errno,
strerror(errno));
#endif
winpr_log_backtrace(TAG, WLOG_ERROR, 20);
SetLastError(ERROR_INTERNAL_ERROR);
return WAIT_FAILED;
}
if (status == 0)
return WAIT_TIMEOUT;
if (bWaitAll && (dwMilliseconds != INFINITE))
{
clock_gettime(CLOCK_MONOTONIC, &timenow);
diff = ts_difftime(&timenow, &starttime);
if (diff / 1000 > dwMilliseconds)
return WAIT_TIMEOUT;
else
dwMilliseconds -= (diff / 1000);
}
signal_handled = FALSE;
for (index = 0; index < polled; index++)
{
DWORD idx;
BOOL signal_set = FALSE;
if (bWaitAll)
idx = poll_map[index];
else
idx = index;
if (!winpr_Handle_GetInfo(lpHandles[idx], &Type, &Object))
{
WLog_ERR(TAG, "invalid hHandle.");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
fd = winpr_Handle_getFd(lpHandles[idx]);
if (fd == -1)
{
WLog_ERR(TAG, "invalid file descriptor");
SetLastError(ERROR_INVALID_HANDLE);
return WAIT_FAILED;
}
#ifdef HAVE_POLL_H
signal_set = pollfds[index].revents & pollfds[index].events;
#else
if (Object->Mode & WINPR_FD_READ)
signal_set = FD_ISSET(fd, &rfds) ? 1 : 0;
if (Object->Mode & WINPR_FD_WRITE)
signal_set |= FD_ISSET(fd, &wfds) ? 1 : 0;
#endif
if (signal_set)
{
DWORD rc = winpr_Handle_cleanup(lpHandles[idx]);
if (rc != WAIT_OBJECT_0)
return rc;
if (bWaitAll)
{
signalled_idx[idx] = TRUE;
/* Continue checks from last position. */
for (; signalled < nCount; signalled++)
{
if (!signalled_idx[signalled])
break;
}
}
if (!bWaitAll)
return (WAIT_OBJECT_0 + index);
if (bWaitAll && (signalled >= nCount))
return (WAIT_OBJECT_0);
signal_handled = TRUE;
}
}
}
while (bWaitAll || !signal_handled);
WLog_ERR(TAG, "failed (unknown error)");
SetLastError(ERROR_INTERNAL_ERROR);
return WAIT_FAILED;
}
DWORD WaitForMultipleObjectsEx(DWORD nCount, const HANDLE *lpHandles, BOOL bWaitAll, DWORD dwMilliseconds, BOOL bAlertable)
{
return WaitForMultipleObjects(nCount, lpHandles, bWaitAll, dwMilliseconds);
}
DWORD SignalObjectAndWait(HANDLE hObjectToSignal, HANDLE hObjectToWaitOn, DWORD dwMilliseconds, BOOL bAlertable)
{
WLog_ERR(TAG, "%s: Not implemented.", __FUNCTION__);
SetLastError(ERROR_NOT_SUPPORTED);
return WAIT_FAILED;
}
#endif
Reference in New Issue View Git Blame Copy Permalink