#include "il2cpp-config.h"
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#if (IL2CPP_TARGET_POSIX || IL2CPP_SUPPORT_SOCKETS_POSIX_API) && !IL2CPP_TINY_WITHOUT_DEBUGGER
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#if IL2CPP_TARGET_SWITCH
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#include <errno.h>
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#else
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#include <sys/errno.h>
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#endif
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#include "os/Posix/PosixHelpers.h"
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namespace il2cpp
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{
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namespace os
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{
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namespace posix
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{
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int Poll(pollfd* handles, int numHandles, int timeout)
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{
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int32_t ret = 0;
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time_t start = time(NULL);
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do
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{
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ret = poll(handles, numHandles, timeout);
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if (timeout > 0 && ret < 0)
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{
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const int32_t err = errno;
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const int32_t sec = time(NULL) - start;
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timeout -= sec * 1000;
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if (timeout < 0)
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timeout = 0;
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errno = err;
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}
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}
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#if IL2CPP_TARGET_LINUX
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while (ret == -1 && (errno == EINTR || errno == EAGAIN));
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#else
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while (ret == -1 && errno == EINTR);
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#endif
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#if IL2CPP_TARGET_LINUX
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// On Linux, socket will report POLLERR if the other end has been closed, in addition to normal POLLHUP
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// From man page:
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// POLLERR
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// Error condition(only returned in revents; ignored in events).
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// This bit is also set for a file descriptor referring to the
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// write end of a pipe when the read end has been closed.
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//
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// Mac and Windows doesn't do it, so we zero out that bit if POLLHUP is set on Linux to get consistent behaviour
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for (int i = 0; i < numHandles; i++)
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{
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if ((handles[i].revents & POLLERR) && (handles[i].revents & POLLHUP))
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handles[i].revents &= ~POLLERR & handles[i].events;
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}
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#endif
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return ret;
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}
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}
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}
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}
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#endif // IL2CPP_TARGET_POSIX
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