diff options
Diffstat (limited to 'konqueror/preloader/configure.in.in')
| -rw-r--r-- | konqueror/preloader/configure.in.in | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/konqueror/preloader/configure.in.in b/konqueror/preloader/configure.in.in new file mode 100644 index 000000000..315b23c97 --- /dev/null +++ b/konqueror/preloader/configure.in.in @@ -0,0 +1,151 @@ +dnl check whether mallinfo() is available and which fields to use to find out memory usage +dnl it's used in konq_mainwindow.cc +dnl warning, ugly code ahead +dnl some implementations have mallinfo() in stdlib.h, others in malloc.h +dnl fields showing memory usage should be hblkhd, uordblks and usmblks, +dnl different implementations use different combinations of these (which is ok), +dnl but some of them "reuse" fields they don't use for other purposes + +AC_DEFUN([KDE_MALLINFO_CHECK], +[ +AC_MSG_CHECKING([for mallinfo() in $1]) +AC_CACHE_VAL(kde_cv_func_mallinfo_$2, + [ + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([#include $1], + [ + struct mallinfo m; + int dummy; + m = mallinfo(); + dummy = m.hblkhd; + dummy = m.uordblks; + dummy = m.usmblks; + dummy = dummy; + ], + kde_cv_func_mallinfo_$2=yes, + kde_cv_func_mallinfo_$2=no) + AC_LANG_RESTORE + ]) +if test "$kde_cv_func_mallinfo_$2" = "yes"; then + kde_mallinfo_type=$2 +fi +AC_MSG_RESULT($kde_cv_func_mallinfo_$2) +]) + + +AC_DEFUN([KDE_MALLINFO_CHECK_FIELD], +[ +AC_MSG_CHECKING([whether to use mallinfo field $1]) +AC_CACHE_VAL(kde_cv_func_mallinfo_field_$1, + [ + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_RUN( + [ + +#include <$kde_mallinfo_type.h> +enum use_type { No, Yes, Never }; +use_type use_field = No; +const int SIZE = 4 * 1024 * 1024; +const int SMALL_SIZE = 4 * 1024; + +void dif( struct mallinfo& m1, struct mallinfo& m2, bool alloc ) + { + int difval = m2.$1 - m1.$1; + if( alloc ) + { + if( difval >= SIZE && difval < 2 * SIZE && use_field != Never ) + use_field = Yes; + } + else // !alloc + { + difval = -difval; + if( difval > SMALL_SIZE && ( difval < SIZE || difval >= 2 * SIZE ) && use_field == Yes ) + use_field = Never; + } + } + +int main() + { + free( malloc( SIZE * 2 )); // avoid Doug Lea's malloc feature of having total_max in usmblks + struct mallinfo m1 = mallinfo(); + void* mem1 = malloc( SIZE ); + struct mallinfo m2 = mallinfo(); + free( mem1 ); + struct mallinfo m3 = mallinfo(); + void* mem2[ SIZE / 32 ]; + for( int i = 0; + i < SIZE / 32; + ++i ) + mem2[ i ] = malloc( 32 ); + struct mallinfo m4 = mallinfo(); + for( int i = 0; + i < SIZE / 32; + ++i ) + free( mem2[ i ] ); + struct mallinfo m5 = mallinfo(); + void* mem3[ SIZE / 1024 ]; + for( int i = 0; + i < SIZE / 1024; + ++i ) + mem3[ i ] = malloc( 1024 ); + struct mallinfo m6 = mallinfo(); + for( int i = 0; + i < SIZE / 1024; + ++i ) + free( mem3[ i ] ); + struct mallinfo m7 = mallinfo(); + dif( m1, m2, true ); + dif( m2, m3, false ); + dif( m3, m4, true ); + dif( m4, m5, false ); + dif( m5, m6, true ); + dif( m6, m7, false ); + return use_field == Yes ? 0 : 1; + } + + ], + [kde_cv_func_mallinfo_field_$1=yes], + [kde_cv_func_mallinfo_field_$1=no], + [kde_cv_func_mallinfo_field_$1=no]) + AC_LANG_RESTORE + ]) +AC_MSG_RESULT($kde_cv_func_mallinfo_field_$1) +kde_mallinfo_$1=$kde_cv_func_mallinfo_field_$1 +if test "$kde_mallinfo_$1" = "yes"; then + AC_DEFINE( KDE_MALLINFO_FIELD_$1, 1, [Use mallinfo field $1]) +fi +]) + + +kde_mallinfo_type= +KDE_MALLINFO_CHECK([<stdlib.h>],stdlib) +if test -z "$kde_mallinfo_type"; then + KDE_MALLINFO_CHECK([<malloc.h>],malloc) +fi + +AC_TRY_LINK_FUNC(mallinfo, + [], + [ AC_CHECK_LIB(malloc,mallinfo, + [ AC_SUBST(LIBMALLOC,"-lmalloc") ], + [ kde_mallinfo_type="" ]) + ]) + +if test -n "$kde_mallinfo_type"; then + KDE_MALLINFO_CHECK_FIELD(hblkhd) + KDE_MALLINFO_CHECK_FIELD(uordblks) + KDE_MALLINFO_CHECK_FIELD(usmblks) + if test -z "$kde_mallinfo_hblkhd" -a \ + -z "$kde_mallinfo_uordblks" -a \ + -z "$kde_mallinfo_usmblks"; then + kde_mallinfo_type= + fi +fi + + +if test "$kde_mallinfo_type" = "stdlib"; then + AC_DEFINE(KDE_MALLINFO_STDLIB, 1, [mallinfo() is available in <stdlib.h>]) +elif test "$kde_mallinfo_type" = "malloc"; then + AC_DEFINE(KDE_MALLINFO_MALLOC, 1, [mallinfo() is available in <malloc.h>]) +fi |