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// wait.cpp - written and placed in the public domain by Wei Dai
#include "pch.h"
#include "wait.h"
#include "misc.h"
#ifdef SOCKETS_AVAILABLE
#ifdef USE_BERKELEY_STYLE_SOCKETS
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
WaitObjectContainer::WaitObjectContainer()
{
Clear();
}
void WaitObjectContainer::Clear()
{
#ifdef USE_WINDOWS_STYLE_SOCKETS
m_handles.clear();
#else
m_maxFd = 0;
FD_ZERO(&m_readfds);
FD_ZERO(&m_writefds);
#endif
m_noWait = false;
}
#ifdef USE_WINDOWS_STYLE_SOCKETS
void WaitObjectContainer::AddHandle(HANDLE handle)
{
m_handles.push_back(handle);
}
bool WaitObjectContainer::Wait(unsigned long milliseconds)
{
if (m_noWait || m_handles.empty())
return true;
DWORD result = ::WaitForMultipleObjects(m_handles.size(), &m_handles[0], FALSE, milliseconds);
if (result >= WAIT_OBJECT_0 && result < WAIT_OBJECT_0 + m_handles.size())
return true;
else if (result == WAIT_TIMEOUT)
return false;
else
throw Err("WaitObjectContainer: WaitForMultipleObjects failed with error " + IntToString(::GetLastError()));
}
#else
void WaitObjectContainer::AddReadFd(int fd)
{
FD_SET(fd, &m_readfds);
m_maxFd = STDMAX(m_maxFd, fd);
}
void WaitObjectContainer::AddWriteFd(int fd)
{
FD_SET(fd, &m_writefds);
m_maxFd = STDMAX(m_maxFd, fd);
}
bool WaitObjectContainer::Wait(unsigned long milliseconds)
{
if (m_noWait || m_maxFd == 0)
return true;
timeval tv, *timeout;
if (milliseconds == INFINITE_TIME)
timeout = NULL;
else
{
tv.tv_sec = milliseconds / 1000;
tv.tv_usec = (milliseconds % 1000) * 1000;
timeout = &tv;
}
int result = select(m_maxFd+1, &m_readfds, &m_writefds, NULL, timeout);
if (result > 0)
return true;
else if (result == 0)
return false;
else
throw Err("WaitObjectContainer: select failed with error " + errno);
}
#endif
// ********************************************************
bool Waitable::Wait(unsigned long milliseconds)
{
WaitObjectContainer container;
GetWaitObjects(container);
return container.Wait(milliseconds);
}
NAMESPACE_END
#endif
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