Ping Il ven 4 mar 2022, 21:58 zack leung <zakthertems...@gmail.com> ha scritto:
> closes #4503 > --- > cpukit/include/rtems/libcsupport.h | 5 +++ > cpukit/libcsupport/src/mallocusablesize.c | 48 +++++++++++++++++++++++ > spec/build/cpukit/librtemscpu.yml | 1 + > testsuites/libtests/malloctest/init.c | 15 ++++++- > 4 files changed, 68 insertions(+), 1 deletion(-) > create mode 100644 cpukit/libcsupport/src/mallocusablesize.c > > diff --git a/cpukit/include/rtems/libcsupport.h > b/cpukit/include/rtems/libcsupport.h > index f4be4cfc9a..5110ab0fbe 100644 > --- a/cpukit/include/rtems/libcsupport.h > +++ b/cpukit/include/rtems/libcsupport.h > @@ -74,6 +74,11 @@ extern size_t malloc_free_space(void); > */ > extern int malloc_info(Heap_Information_block *the_info); > > +/** > + * @brief Find the usable size of the block of memory . > + */ > +extern size_t malloc_usable_size(void *ptr); > + > /* > * Prototypes required to install newlib reentrancy user extension > */ > diff --git a/cpukit/libcsupport/src/mallocusablesize.c > b/cpukit/libcsupport/src/mallocusablesize.c > new file mode 100644 > index 0000000000..b7e573023a > --- /dev/null > +++ b/cpukit/libcsupport/src/mallocusablesize.c > @@ -0,0 +1,48 @@ > +/* > + * SPDX-License-Identifier: BSD-2-Clause > + * > + * Copyright (C) 2022 zacchaeus leung > + * > + * Redistribution and use in source and binary forms, with or without > + * modification, are permitted provided that the following conditions > + * are met: > + * 1. Redistributions of source code must retain the above copyright > + * notice, this list of conditions and the following disclaimer. > + * 2. Redistributions in binary form must reproduce the above copyright > + * notice, this list of conditions and the following disclaimer in the > + * documentation and/or other materials provided with the distribution. > + * > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS > "AS IS" > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, > THE > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR > PURPOSE > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS > BE > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR > BUSINESS > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF > THE > + * POSSIBILITY OF SUCH DAMAGE. > + */ > + > +#ifdef HAVE_CONFIG_H > +#include "config.h" > +#endif > + > +#include <rtems/libcsupport.h> > +#include <rtems/malloc.h> > +#include <rtems/score/heapimpl.h> > + > +size_t malloc_usable_size( void *ptr ) { > + > + Heap_Control *heap_ptr ; > + size_t size; > + if ( ptr == NULL ) { > + return 0; > + } > + > + heap_ptr = malloc_get_heap_pointer(); > + _Heap_Size_of_alloc_area( heap_ptr, ptr, &size ); > + > + return size; > +} > diff --git a/spec/build/cpukit/librtemscpu.yml > b/spec/build/cpukit/librtemscpu.yml > index c224937348..2ef11e7e2d 100644 > --- a/spec/build/cpukit/librtemscpu.yml > +++ b/spec/build/cpukit/librtemscpu.yml > @@ -670,6 +670,7 @@ source: > - cpukit/libcsupport/src/lseek.c > - cpukit/libcsupport/src/lstat.c > - cpukit/libcsupport/src/malloc.c > +- cpukit/libcsupport/src/mallocusablesize.c > - cpukit/libcsupport/src/malloc_deferred.c > - cpukit/libcsupport/src/malloc_dirtier.c > - cpukit/libcsupport/src/malloc_walk.c > diff --git a/testsuites/libtests/malloctest/init.c > b/testsuites/libtests/malloctest/init.c > index a33764177d..871edb540e 100644 > --- a/testsuites/libtests/malloctest/init.c > +++ b/testsuites/libtests/malloctest/init.c > @@ -1362,6 +1362,18 @@ static void test_alloc_zero_size(void) > rtems_test_assert( p == NULL ); > rtems_test_assert( errno == -1 ); > } > +static void test_usablesize(void) > +{ > + int * a = malloc(sizeof( int )*100); > + int alloc_size=sizeof( int ) *100 ; > + rtems_test_assert( malloc_usable_size( a ) <= alloc_size + > CPU_HEAP_ALIGNMENT ); > + free(a); > + > + char * b = malloc(sizeof ( char ) 100); > + int alloc_size 2= sizeof ( char ) *100 ; > + rtems_test_assert( malloc_usable_size ( b ) <= alloc_size2 + > CPU_HEAP_ALIGNMENT); > + free( b ); > +} > > rtems_task Init( > rtems_task_argument argument > @@ -1405,6 +1417,7 @@ rtems_task Init( > test_protected_heap_info(); > test_rtems_heap_allocate_aligned_with_boundary(); > test_rtems_malloc(); > + test_usablesize(); > test_rtems_calloc(); > test_greedy_allocate(); > test_alloc_zero_size(); > @@ -1524,4 +1537,4 @@ RTEMS_SYSINIT_ITEM( > test_early_malloc, > RTEMS_SYSINIT_INITIAL_EXTENSIONS, > RTEMS_SYSINIT_ORDER_FIRST > -); > +); > \ No newline at end of file > -- > 2.35.1 > _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel