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67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* noblock.c
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* set a file descriptor as blocking or non-blocking
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*
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* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/port/noblock.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include <fcntl.h>
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/*
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* Put socket into nonblock mode.
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* Returns true on success, false on failure.
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*/
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bool
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pg_set_noblock(pgsocket sock)
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{
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#if !defined(WIN32)
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int flags;
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flags = fcntl(sock, F_GETFL);
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if (flags < 0)
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return false;
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if (fcntl(sock, F_SETFL, (flags | O_NONBLOCK)) == -1)
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return false;
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return true;
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#else
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unsigned long ioctlsocket_ret = 1;
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/* Returns non-0 on failure, while fcntl() returns -1 on failure */
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return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
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#endif
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}
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/*
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* Put socket into blocking mode.
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* Returns true on success, false on failure.
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*/
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bool
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pg_set_block(pgsocket sock)
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{
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#if !defined(WIN32)
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int flags;
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flags = fcntl(sock, F_GETFL);
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if (flags < 0)
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return false;
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if (fcntl(sock, F_SETFL, (flags & ~O_NONBLOCK)) == -1)
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return false;
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return true;
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#else
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unsigned long ioctlsocket_ret = 0;
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/* Returns non-0 on failure, while fcntl() returns -1 on failure */
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return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
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#endif
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}
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