650dc9b332
(helper_put_filedescriptors): Change to static linkage. (helper_get_filedescriptors): Likewise. From-SVN: r73545
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
// natSelectorImplPosix.cc
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/* Copyright (C) 2002, 2003 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <platform.h>
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#include <errno.h>
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#include <string.h>
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#include <gnu/java/nio/SelectorImpl.h>
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#include <java/io/IOException.h>
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static void
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helper_put_filedescriptors (jintArray fdArray, fd_set& fds, int& max_fd)
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{
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jint* tmpFDArray = elements (fdArray);
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for (int index = 0; index < JvGetArrayLength (fdArray); index++)
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{
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FD_SET (tmpFDArray [index], &fds);
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if (tmpFDArray [index] > max_fd)
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max_fd = tmpFDArray [index];
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}
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}
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static void
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helper_get_filedescriptors (jintArray& fdArray, fd_set fds)
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{
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jint* tmpFDArray = elements (fdArray);
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for (int index = 0; index < JvGetArrayLength (fdArray); index++)
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if (!FD_ISSET (tmpFDArray [index], &fds))
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tmpFDArray [index] = 0;
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}
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jint
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gnu::java::nio::SelectorImpl::implSelect (jintArray read, jintArray write,
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jintArray except, jlong timeout)
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{
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jint result;
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int max_fd = 0;
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fd_set read_fds;
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fd_set write_fds;
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fd_set except_fds;
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struct timeval real_time_data;
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struct timeval *time_data = NULL;
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real_time_data.tv_sec = 0;
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real_time_data.tv_usec = timeout;
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// If not legal timeout value is given, use NULL.
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// This means an infinite timeout.
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if (timeout >= 0)
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{
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time_data = &real_time_data;
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}
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// Reset all fd_set structures
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FD_ZERO (&read_fds);
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FD_ZERO (&write_fds);
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FD_ZERO (&except_fds);
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// Fill the fd_set data structures for the _Jv_select() call.
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helper_put_filedescriptors (read, read_fds, max_fd);
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helper_put_filedescriptors (write, write_fds, max_fd);
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helper_put_filedescriptors (except, except_fds, max_fd);
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// Actually do the select
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result = _Jv_select (max_fd + 1, &read_fds, &write_fds, &except_fds, time_data);
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if (result < 0)
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{
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char* strerr = strerror (errno);
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throw new ::java::io::IOException (JvNewStringUTF (strerr));
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}
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// Set the file descriptors according to the values returned from select().
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helper_get_filedescriptors (read, read_fds);
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helper_get_filedescriptors (write, write_fds);
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helper_get_filedescriptors (except, except_fds);
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return result;
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}
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