Mercurial > hg > octave-shane > gnulib-hg
view m4/iconv_open-utf.m4 @ 16869:38e6d30d7e4d
poll/select: prevent busy-waiting
2012-05-21 Paolo Bonzini <bonzini@gnu.org>
poll/select: prevent busy-waiting. SwitchToThread() only gives away
the rest of the current time slice to another thread in the current
process. So if the thread that feeds the file decscriptor we're
polling is not in the current process, we get busy-waiting.
* lib/poll.c: Use SleepEx(1, TRUE) instead of SwitchToThread().
Patch from Theodore Leblond.
* lib/select.c: Split polling out of the loop that sets the output
fd_sets. Check for zero result and loop if the wait timeout is
infinite.
| author | Paolo Bonzini <bonzini@gnu.org> |
|---|---|
| date | Mon, 21 May 2012 09:52:42 +0200 |
| parents | 8250f2777afc |
| children | e542fd46ad6f |
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# iconv_open-utf.m4 serial 1 dnl Copyright (C) 2007-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. # A placeholder to ensure that this m4 file gets included by aclocal. AC_DEFUN([gl_FUNC_ICONV_OPEN_UTF], []) AC_DEFUN([gl_FUNC_ICONV_OPEN_UTF_SUPPORT], [ dnl This macro relies on am_cv_func_iconv and gl_func_iconv_gnu from dnl gl_FUNC_ICONV_OPEN, but is called from within gl_FUNC_ICONV_OPEN. dnl *Not* AC_REQUIRE([gl_FUNC_ICONV_OPEN]). AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_REQUIRE([gl_ICONV_H_DEFAULTS]) if test "$am_cv_func_iconv" = yes; then AC_CACHE_CHECK([whether iconv supports conversion between UTF-8 and UTF-{16,32}{BE,LE}], [gl_cv_func_iconv_supports_utf], [ save_LIBS="$LIBS" LIBS="$LIBS $LIBICONV" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #include <iconv.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> int main () { int result = 0; /* Test conversion from UTF-8 to UTF-16BE with no errors. */ { static const char input[] = "Japanese (\346\227\245\346\234\254\350\252\236) [\360\235\224\215\360\235\224\236\360\235\224\255]"; static const char expected[] = "\000J\000a\000p\000a\000n\000e\000s\000e\000 \000(\145\345\147\054\212\236\000)\000 \000[\330\065\335\015\330\065\335\036\330\065\335\055\000]"; iconv_t cd; cd = iconv_open ("UTF-16BE", "UTF-8"); if (cd == (iconv_t)(-1)) result |= 1; else { char buf[100]; const char *inptr; size_t inbytesleft; char *outptr; size_t outbytesleft; size_t res; inptr = input; inbytesleft = sizeof (input) - 1; outptr = buf; outbytesleft = sizeof (buf); res = iconv (cd, (ICONV_CONST char **) &inptr, &inbytesleft, &outptr, &outbytesleft); if (!(res == 0 && inbytesleft == 0)) result |= 1; else if (!(outptr == buf + (sizeof (expected) - 1))) result |= 1; else if (!(memcmp (buf, expected, sizeof (expected) - 1) == 0)) result |= 1; else if (!(iconv_close (cd) == 0)) result |= 1; } } /* Test conversion from UTF-8 to UTF-16LE with no errors. */ { static const char input[] = "Japanese (\346\227\245\346\234\254\350\252\236) [\360\235\224\215\360\235\224\236\360\235\224\255]"; static const char expected[] = "J\000a\000p\000a\000n\000e\000s\000e\000 \000(\000\345\145\054\147\236\212)\000 \000[\000\065\330\015\335\065\330\036\335\065\330\055\335]\000"; iconv_t cd; cd = iconv_open ("UTF-16LE", "UTF-8"); if (cd == (iconv_t)(-1)) result |= 2; else { char buf[100]; const char *inptr; size_t inbytesleft; char *outptr; size_t outbytesleft; size_t res; inptr = input; inbytesleft = sizeof (input) - 1; outptr = buf; outbytesleft = sizeof (buf); res = iconv (cd, (ICONV_CONST char **) &inptr, &inbytesleft, &outptr, &outbytesleft); if (!(res == 0 && inbytesleft == 0)) result |= 2; else if (!(outptr == buf + (sizeof (expected) - 1))) result |= 2; else if (!(memcmp (buf, expected, sizeof (expected) - 1) == 0)) result |= 2; else if (!(iconv_close (cd) == 0)) result |= 2; } } /* Test conversion from UTF-8 to UTF-32BE with no errors. */ { static const char input[] = "Japanese (\346\227\245\346\234\254\350\252\236) [\360\235\224\215\360\235\224\236\360\235\224\255]"; static const char expected[] = "\000\000\000J\000\000\000a\000\000\000p\000\000\000a\000\000\000n\000\000\000e\000\000\000s\000\000\000e\000\000\000 \000\000\000(\000\000\145\345\000\000\147\054\000\000\212\236\000\000\000)\000\000\000 \000\000\000[\000\001\325\015\000\001\325\036\000\001\325\055\000\000\000]"; iconv_t cd; cd = iconv_open ("UTF-32BE", "UTF-8"); if (cd == (iconv_t)(-1)) result |= 4; else { char buf[100]; const char *inptr; size_t inbytesleft; char *outptr; size_t outbytesleft; size_t res; inptr = input; inbytesleft = sizeof (input) - 1; outptr = buf; outbytesleft = sizeof (buf); res = iconv (cd, (ICONV_CONST char **) &inptr, &inbytesleft, &outptr, &outbytesleft); if (!(res == 0 && inbytesleft == 0)) result |= 4; else if (!(outptr == buf + (sizeof (expected) - 1))) result |= 4; else if (!(memcmp (buf, expected, sizeof (expected) - 1) == 0)) result |= 4; else if (!(iconv_close (cd) == 0)) result |= 4; } } /* Test conversion from UTF-8 to UTF-32LE with no errors. */ { static const char input[] = "Japanese (\346\227\245\346\234\254\350\252\236) [\360\235\224\215\360\235\224\236\360\235\224\255]"; static const char expected[] = "J\000\000\000a\000\000\000p\000\000\000a\000\000\000n\000\000\000e\000\000\000s\000\000\000e\000\000\000 \000\000\000(\000\000\000\345\145\000\000\054\147\000\000\236\212\000\000)\000\000\000 \000\000\000[\000\000\000\015\325\001\000\036\325\001\000\055\325\001\000]\000\000\000"; iconv_t cd; cd = iconv_open ("UTF-32LE", "UTF-8"); if (cd == (iconv_t)(-1)) result |= 8; else { char buf[100]; const char *inptr; size_t inbytesleft; char *outptr; size_t outbytesleft; size_t res; inptr = input; inbytesleft = sizeof (input) - 1; outptr = buf; outbytesleft = sizeof (buf); res = iconv (cd, (ICONV_CONST char **) &inptr, &inbytesleft, &outptr, &outbytesleft); if (!(res == 0 && inbytesleft == 0)) result |= 8; else if (!(outptr == buf + (sizeof (expected) - 1))) result |= 8; else if (!(memcmp (buf, expected, sizeof (expected) - 1) == 0)) result |= 8; else if (!(iconv_close (cd) == 0)) result |= 8; } } /* Test conversion from UTF-16BE to UTF-8 with no errors. This test fails on NetBSD 3.0. */ { static const char input[] = "\000J\000a\000p\000a\000n\000e\000s\000e\000 \000(\145\345\147\054\212\236\000)\000 \000[\330\065\335\015\330\065\335\036\330\065\335\055\000]"; static const char expected[] = "Japanese (\346\227\245\346\234\254\350\252\236) [\360\235\224\215\360\235\224\236\360\235\224\255]"; iconv_t cd; cd = iconv_open ("UTF-8", "UTF-16BE"); if (cd == (iconv_t)(-1)) result |= 16; else { char buf[100]; const char *inptr; size_t inbytesleft; char *outptr; size_t outbytesleft; size_t res; inptr = input; inbytesleft = sizeof (input) - 1; outptr = buf; outbytesleft = sizeof (buf); res = iconv (cd, (ICONV_CONST char **) &inptr, &inbytesleft, &outptr, &outbytesleft); if (!(res == 0 && inbytesleft == 0)) result |= 16; else if (!(outptr == buf + (sizeof (expected) - 1))) result |= 16; else if (!(memcmp (buf, expected, sizeof (expected) - 1) == 0)) result |= 16; else if (!(iconv_close (cd) == 0)) result |= 16; } } return result; }]])], [gl_cv_func_iconv_supports_utf=yes], [gl_cv_func_iconv_supports_utf=no], [ dnl We know that GNU libiconv, GNU libc, and Solaris >= 9 do. dnl OSF/1 5.1 has these encodings, but inserts a BOM in the "to" dnl direction. gl_cv_func_iconv_supports_utf=no if test $gl_func_iconv_gnu = yes; then gl_cv_func_iconv_supports_utf=yes else changequote(,)dnl case "$host_os" in solaris2.9 | solaris2.1[0-9]) gl_cv_func_iconv_supports_utf=yes ;; esac changequote([,])dnl fi ]) LIBS="$save_LIBS" ]) fi ])