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Update `NEWS'.

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Ludovic Courtès 2010-02-17 00:50:24 +01:00
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NEWS
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@ -25,41 +25,63 @@ unavailable.
** Foreign function interface ** Foreign function interface
dynamic-link / dynamic-func still get the syms; we just added a libffi This release comes with a new `(system foreign)' module. Currently it
interface to call functions. integer, floating point, pointer, and provides a low level "foreign function interface" (FFI), which allows
struct types supported. simple finalization interface; complicated users users to write Scheme code to invoke C code, without writing a single
to use guardians. (system foreign); high-level wrapper needed. vm line of C code.
integration. bytevector integration.
The `dynamic-link' and `dynamic-func' procedures, which have been
available for a long time, can be used to get the address of a C
function as a "foreign" object at the Scheme level; using libffi, Guile
can construct calls to these functions.
The arguments to a C function may be integers, floating point numbers,
pointers, and structs. From Scheme they are all represented as foreign
objects. Foreign objects can be converted back and forth to/from a
bytevector. They can have an associated finalizer (e.g., a procedure
that will reclaim any associated resources when the object becomes
unreachable); alternatively, they can be finalized using a guardian.
The `(system foreign)' API is currently low-level and possibly
inconvenient. It will be extended to provide higher-level constructs.
** Incompatible changes to the foreign value interface introduced in 1.9.7 ** Incompatible changes to the foreign value interface introduced in 1.9.7
C extensions need recompilation The API in <libguile/foreign.h> changed since 1.9.7. C extensions need
recompilation.
** dynamic-wind compilation ** `dynamic-wind' compilation
inline body thunk; wind/unwind via VM; add to tree-il `dynamic-wind' now has special support from the compiler and VM. The
compiler is able to inline the body of a `dynamic-wind', making it more
efficient. The run-time support is provided by the `wind' and `unwind'
VM instructions.
** vlists ** New module: `(ice-9 vlist)'
vlists and vhashes. used internally. composed of awesome. This module provides an implementation of Bagwell's VLists and
VList-based hash lists ("VHashes"). VLists are a list data structure
that provides constant-time random access and length computation
logarithmic in the number of elements. VLists also use less storage
space than standard Scheme linked lists.
** getaddrinfo VHashes are a functional dictionary type similar to association lists.
However, unlike association lists, accessing a value given its key is
typically a constant-time operation. VHashes are now used in a few
places of the compiler.
* libguile/net_db.c (sym_getaddrinfo_error, sym_ai_passive, ** New procedures: `getaddrinfo' and family
sym_ai_canonname, sym_ai_numerichost, sym_ai_numericserv,
sym_ai_v4mapped, sym_ai_all, sym_ai_addrconfig, sym_eai_badflags,
sym_eai_noname, sym_eai_again, sym_eai_fail, sym_eai_family,
sym_eai_socktype, sym_eai_service, sym_eai_memory, sym_eai_system,
sym_eai_overflow, sym_eai_nodata, sym_eai_addrfamily,
sym_eai_inprogress, sym_eai_canceled, sym_eai_notcanceled,
sym_eai_alldone, sym_eai_intr, sym_eai_idn_encode): New variables.
(scm_from_addrinfo, scm_getaddrinfo, scm_gai_strerror): New functions.
* module/ice-9/networking.scm (addrinfo:flags, addrinfo:fam, Bindings for the POSIX getaddrinfo(3) host name and service lookup
addrinfo:socktype, addrinfo:protocol, addrinfo:addr, function are available. This function is now recommended over
addrinfo:canonname): New procedures. `gethostname' and friends as it's more expressive and can return a
sorted list of addresses, as opposed to a single address.
** tutorial deleted ** Tutorial deleted
The tutorial was removed. It was incomplete, outdated, and contained C
examples that were no longer valid. The reference manual, on the other
hand, contains up-to-date examples and documentation.
** And of course, the usual collection of bugfixes ** And of course, the usual collection of bugfixes
@ -76,6 +98,8 @@ Changes in 1.9.x (since the 1.8.x series):
** `(rnrs bytevector)', the R6RS bytevector API ** `(rnrs bytevector)', the R6RS bytevector API
** `(rnrs io ports)', a subset of the R6RS I/O port API ** `(rnrs io ports)', a subset of the R6RS I/O port API
** `(system xref)', a cross-referencing facility (FIXME undocumented) ** `(system xref)', a cross-referencing facility (FIXME undocumented)
** `(ice-9 vlist)', lists with constant-time random access; hash lists
** `(system foreign)', foreign function interface (FIXME: undocumented)
** Imported statprof, SSAX, and texinfo modules from Guile-Lib ** Imported statprof, SSAX, and texinfo modules from Guile-Lib
@ -253,6 +277,10 @@ in the next prerelease.
Scheme binding for the `getsid' C library call. Scheme binding for the `getsid' C library call.
** New POSIX procedure: `getaddrinfo'
Scheme binding for the `getaddrinfo' C library function.
** New procedure in `(oops goops)': `method-formals' ** New procedure in `(oops goops)': `method-formals'
** BUG: (procedure-property func 'arity) does not work on compiled ** BUG: (procedure-property func 'arity) does not work on compiled
@ -1228,6 +1256,10 @@ See http://www.hpl.hp.com/personal/Hans_Boehm/gc/, for more information.
See http://www.gnu.org/software/libunistring/, for more information. Our See http://www.gnu.org/software/libunistring/, for more information. Our
Unicode support uses routines from libunistring. Unicode support uses routines from libunistring.
** New dependency: libffi
See http://sourceware.org/libffi/, for more information.
Changes in 1.8.8 (since 1.8.7) Changes in 1.8.8 (since 1.8.7)