Unused slabs which get recycled are no longer reinitialized from scratch if their chunk size matches what the allocator needed. If the chunk size matches, the list of available chunks is left unchanged, and just the various counters are reset.
Added __get_slab_stats() function.
Added support for global __slab_purge_threshold tuning variable.
Added a short test program for the slab allocator.
The malloc-test program was linked against the wrong object file in GNUmakefile.68k. Fixed.
If the first slab in the list of slabs which share the same chunk size has no more room, it means that all other slabs following it have no room either. This speeds up the test to find a slab with free space, which can now abort and directly proceed to allocate memory for a new slab.
If an empty slab's decay count hits zero, it is moved to the front of the empty slab list to be reclaimed more quickly.
Allocations made from the slab now carry a pointer back to the slab which they are a part of. This speeds up deallocation but has the downside of making the smallest usable slab chunk size 64 bytes, which is double what used to be the minimum before.
Added a slab allocator which replaces the use of memory pools or the plain AllocMem() operations, respectively. In order to activate the slab allocator, choose a slab size (e.g. 2048 bytes or 4096 bytes) and declare a global variable like this:
ULONG __slab_max_size = 2048;
Memory allocations smaller than the slab size will be made from "slabs", i.e. large chunks of memory of the given size. Larger allocations will be managed separately.
A slab-allocator can now be used as the back-end for all memory allocations by setting __slab_max_size to a value > 0. This controls the slab size used for allocations and should be a power of 2, such as 2048 or 4096 bytes.
This change still needs testing.
checking code. It never actually worked. The bit that does work is the stack
usage measurement code, plus the bit that sets up the the custom stack
according to local setting or by calling a query function.
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olaf in a different way so that libm.a never contains any hard float
opcodes and instead libm881 contains them. so the separate soft-float
directory are not required.
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resolve the issues with FPU code popping up in the mathieee#?.library
software floating point code.
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our libraries. In addition the specs file now also respects the -msoft-float
option at link time and sets the default link directory accordingly.
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very much!
- <unistd.h> now also include <stdio.h>, so that the SEEK_SET, etc. macros
are defined for lseek() to use.
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resolution.
- In tcflush() a break signal can no longer cause the read flush loop
to be quit with two semaphores still locked.
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stored in a low level unbuffered file/socket data structure. These function
perform the proper locking and are thus safe to use in a thread-safe environment.
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works for soft linked objects and returns an error for everything else.
This is based upon a fix by Peter Bengtsson. Thank you very much!
- Moved the lstat() local Lock() function into its own separate file.
- uname() now returns correct and robust information for OS version
numbers > 36. This integrates a fix by Peter Bengtsson. Thank you
very much!
- Moved the crtbegin.o/crtend.o files out of the link libraries. Moving
them in was intended to work as a fix for the shared library build, but
now it seems that this has to be done at the link stage through the
GCC specs file...
- Integrated a fix for __rem_pio2() which affects sin(), tan() and cos(),
contributed by Steven Solie. Thank you very much!
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- You can now make unlink() stop after a failed deletion attempt which
failed because the object to be deleted was reported as being "in use".
The libunix.a variant defaults to report the deletion to have succeeded
under these circumstances and later tries to delete the files marked
for deletion. See <dos.h> for a brief documentation of how to change
the behaviour.
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to avoid that the command line wildcard expansion takes place.
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makefiles. The OS4 build makefile was missing lrint() and
lrintf(). Ouch.
- execve() now checks if an abort signal arrives while it's trying
to read the first line of a script, or looking for an executable
on an assignment path.
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replaced by the user. If that function __execve_exit() does not call
exit but just returns to the caller without doing anything, execve()
will return the caller with the return code of the RunCommand()
function.
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by Henning Nielsen Lund. Thank you very much!
- atoll() no longer sets 'errno' directly but now calls __set_errno()
instead.
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Peter Bengtsson. Thank you very much!
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- Added the missing S_ISSOCKET() macro to <sys/stat.h>. Note that this
is not actually a POSIX feature.
- Added fmin(), fminf(), fmax() and fmaxf() to the build makefiles.
Somehow I must have forgotten about them :-(
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to disable wildcard pattern expansion of command line parameters when
linked against "libunix.a". Note that this has no effect on the "regular"
libc.a behaviour.
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hard-coded. You can override it at link time with a different
variable value for __break_signal_mask. This may have to be
augmented by an API for changing the value.
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Thank you very much!
- symlink() now also works for absolute and relative links, and is
part of "libunix.a". This patch was supplied by Henning Nielsen Lund.
Thank you very much!
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longer part of "stdlib_main.c". This helps the C++ support, since the
__main symbol definition no longer clashes with the definition in
"libgcc.a".
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counters for "maximum amount of memory used" and "maximum number of chunks
allocated" to the current figures for these values.
- Fixed the alloca() declaration in <stdlib.h> so that software which keys
off the fact whether or not the alloca preprocessor symbol is defined
will do the right thing.
- Added an optional call-back function which can be called if alloca()
is about to return NULL, which some software does not consider.
Rather than letting such software drop into an illegal memory access
or worse, that call-back function will be invoked instead, which can
print an error message and eventually call abort().
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- You can now request that your program uses the clib2 alloca() function
rather than the built-in compiler alloca().
- alloca() is now part of libunix.a, too.
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request to allocate 0 bytes as an error, returning NULL. They all
return a pointer sized memory chunk (= four bytes) initialized to
NULL (= 0) instead.
- The alloca() implementation which allocates memory from the system
rather than the local stack frame is thread-safe now. It also
interacts with the realloc(), calloc(), free() and malloc() functions
in that the alloca() cleanup routine is called once alloca() has
done its job. If all the memory allocated through alloca() has been
released no further calls to the cleanup function will be made.
- In the thread-safe library, realloc() permitted two different overlapping
calls to succeed in trying to reallocate the same chunk of memory due to
a race condition. Fixed.
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request to allocate 0 bytes as an error, returning NULL. They all
return a 1 byte memory chunk initialized to 0 instead.
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feclearexcept(), fegetenv(), fegetexceptflag(), fegetround(),
feholdexcept(), feraiseexcept(), fesetenv(), fesetexceptflag(),
fetestexcept(), fetestround() and feupdateenv().
- Replaced the old pow() implementation. However, powf() may need to
be changed to set a domain error.
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socket into a separate function which can be overridden by user code.
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daemon startup message by default. You now have to enable this feature
by declaring a global variable called "__check_daemon_startup" which is
described in <dos.h>.
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- The thread-safe library now tries to enable bsdsocket.library base
sharing and attempts to make the TCP/IP stack call the local
__set_errno() and __set_h_errno(), so that any Process calling
the library functions will get a chance to see proper error
codes. Whether any of these features could be enabled can be tested
through two global variables __can_share_socket_library_base and
__thread_safe_errno_h_errno which are defined in <dos.h>. Note that
for both features to work you will need the Roadshow bsdsocket.library
version 4.275 or higher.
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for building code that references the networking API. It is now possible,
provided you build your code with an existing TCP/IP API header file
set (such as from the "Roadshow" SDK) without running into data type
or function prototype declaration conflicts. I have added local versions
of <arpa/inet.h>, <netinet/in.h>, <netdb.h>, <sys/filio.h>, <sys/ioccom.h>,
<sys/ioctl.h>, <sys/select.h> and <sys/socket.h> and updated <unistd.h>,
<pwd.h> and <grp.h> accordingly. Note that some of the function prototypes
will conflict with the bsdsocket.library/usergroup.library API, which is
why you can disable the declarations through the __NO_NET_API preprocessor
symbol: if defined, none of the function prototypes will be defined.
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in the printf(), scanf(), atoll(), strtoll() and strtoull() functions.
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be defined in <unistd.h> have been moved into a separate header file
<sys/clib2_net.h> which, for backwards compatibility, can be include
from within <unistd.h> if the preprocessor symbol __USE_CLIB2_NETLIB
is defined early on. Eventually, <sys/clib2_net.h> should be removed
from the general header files and become a local library build header
file altogether. Note that in this case you would have to build your
own software using common TCP/IP SDK header files.
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files which initialize global data, such as the new "stdlib_program_name.c"
and "stdlib_malloc.c".
- Until I can find a way to invoke it from within the library, the
__machine_test() function is no longer invoked.
- Tagged global data with NOCOMMON attributes.
- Added the __lib_init() and __lib_exit() functions, which are part of the
thread-safe library and which can be used to hook up clib2 with standard
Amiga shared library/device code. Some documentation on how to use them
can be found in the <dos.h> header file.
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it no longer requires that any parameters are quoted and it is automatically
enabled if you link against libunix.a, without libc.a standing a chance to
accidentally override it.
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Henning Nielsen Lund. Thank you very much!
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