From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Matt Wette Newsgroups: gmane.lisp.guile.bugs Subject: bug#27782: mmap for guile Date: Fri, 24 Nov 2017 09:09:33 -0800 Message-ID: References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Content-Type: multipart/alternative; boundary="Apple-Mail=_705C18C9-0341-466A-9392-6E7A4A94B270" X-Trace: blaine.gmane.org 1511543435 14066 195.159.176.226 (24 Nov 2017 17:10:35 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 24 Nov 2017 17:10:35 +0000 (UTC) Cc: 27782@debbugs.gnu.org To: Nala Ginrut Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Fri Nov 24 18:10:27 2017 Return-path: Envelope-to: guile-bugs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eIHUb-0002od-HK for guile-bugs@m.gmane.org; Fri, 24 Nov 2017 18:10:22 +0100 Original-Received: from localhost ([::1]:50389 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIHUi-0003NA-Pg for guile-bugs@m.gmane.org; Fri, 24 Nov 2017 12:10:28 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55109) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eIHUS-0003FW-7B for bug-guile@gnu.org; Fri, 24 Nov 2017 12:10:16 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eIHUJ-0008AU-6U for bug-guile@gnu.org; Fri, 24 Nov 2017 12:10:11 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:47559) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eIHUI-00086r-SX for bug-guile@gnu.org; Fri, 24 Nov 2017 12:10:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1eIHUI-0004SV-EI for bug-guile@gnu.org; Fri, 24 Nov 2017 12:10:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Matt Wette Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Fri, 24 Nov 2017 17:10:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 27782 X-GNU-PR-Package: guile X-GNU-PR-Keywords: Original-Received: via spool by 27782-submit@debbugs.gnu.org id=B27782.151154338417095 (code B ref 27782); Fri, 24 Nov 2017 17:10:02 +0000 Original-Received: (at 27782) by debbugs.gnu.org; 24 Nov 2017 17:09:44 +0000 Original-Received: from localhost ([127.0.0.1]:56238 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eIHTz-0004Rf-PL for submit@debbugs.gnu.org; Fri, 24 Nov 2017 12:09:44 -0500 Original-Received: from mail-pg0-f52.google.com ([74.125.83.52]:43201) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eIHTx-0004RP-Kf for 27782@debbugs.gnu.org; Fri, 24 Nov 2017 12:09:42 -0500 Original-Received: by mail-pg0-f52.google.com with SMTP id r12so15666463pgu.10 for <27782@debbugs.gnu.org>; Fri, 24 Nov 2017 09:09:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:message-id:mime-version:subject:date:in-reply-to:cc:to :references; bh=3x9ftzPvouWiFDG9/Sp1S9Dt4Yx4DFpMGHCcvIRfb64=; b=b1HLjTEcU0GP229FQ/GtzaegTB6X9Ju7APQKbBDzHDDL5ghCc51WopYQCWmyF16voz KOMfcrjgjJ4eIC7CcIl+Wwfy6sC53bphRUOh+rCNQ7UIXiU9mMzKAApHrXOB1vu+mWTp quxg/btxhTuNdwc09BJOxMJAfc3EqokgmfnVrP/AEw6LozCND92u5ttuETVLD0CcpTG7 QE02fnvtRs98MaCLuol9coeQi8h5NpAEDmI/R+pb1bdegsHA5bMJxvqwp5jm24KFj/Us I9ItpM7zob9Sidd6QYSksO46oO7GDHSkUxlFtsBrYi753MI5FCowGSKn/1OhmbwpEatU 0peg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:mime-version:subject:date :in-reply-to:cc:to:references; bh=3x9ftzPvouWiFDG9/Sp1S9Dt4Yx4DFpMGHCcvIRfb64=; b=iuq3yjBr29MezrRbu8HiK9bXH4UnSxyIluTPtglWqTbx0d7cOeJHP4a5kU+F7YZjKu DwKz5FU/iugTNCkjNHZ9/uglzk5b1U0c1a/0MFa4SVruLZQnVi8RGd2IeAb4ukv0l2SP ejbiOjhjEjQ1Dskimu2mR2LMeFDCqTnCYY1RktpOVAYq+kWsjN29Zm2kJBQG/z51Fw0N WkWD8z+pSdGQ6LPRRGTkumUzzjgbcvj62YIbwq7ctyCz5AznQnyMAFMhgjiq5w2Cbzfe QDig3dGNSnpw7Ctz4zYwRhJHsUE8N72U/xLeR/WBjb6URnt0uRdR0igz3XI3WE7POqwQ kFTA== X-Gm-Message-State: AJaThX755fCZpC69fui65Fp19oR5HMMQZj/2NIrcjMHGyxshOKF/bWbx fhv55XmYS+rg7QEr+NFNV9U= X-Google-Smtp-Source: AGs4zMZyU2SN2669cuswEeADZ0DWQcwWtG6oz08ubjByOtXisgKtqx0ojxmo37sTEQKdQQ+1f4ShOQ== X-Received: by 10.99.114.30 with SMTP id n30mr28526846pgc.129.1511543375703; Fri, 24 Nov 2017 09:09:35 -0800 (PST) Original-Received: from nautilus.championbroadband.com (216-165-229-229.championbroadband.com. [216.165.229.229]) by smtp.gmail.com with ESMTPSA id m87sm27843812pfi.88.2017.11.24.09.09.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 Nov 2017 09:09:34 -0800 (PST) In-Reply-To: X-Mailer: Apple Mail (2.3273) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.org gmane.lisp.guile.bugs:8913 Archived-At: --Apple-Mail=_705C18C9-0341-466A-9392-6E7A4A94B270 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 got it. > On Nov 24, 2017, at 8:22 AM, Nala Ginrut wrote: >=20 > Thanks for the work! Could you please add MAP_POPULATE too? >=20 > 2017=E5=B9=B411=E6=9C=8824=E6=97=A5 =E4=B8=8B=E5=8D=8811:55=EF=BC=8C"Mat= t Wette" >=E5=86=99=E9=81= =93=EF=BC=9A >=20 >=20 >=20 >=20 >=20 > I did a little more on this. Here is the latest. > It provides mmap (not searched) and mmap/search (searched for pointers = to GC). >=20 >=20 > --- libguile/filesys.c.orig 2017-03-01 10:54:31.000000000 -0800 > +++ libguile/filesys.c 2017-10-28 10:05:10.000000000 -0700 > @@ -1828,9 +1828,14 @@ >=20 >=20 >=20 > +#include "mman.c" > + > void > scm_init_filesys () > { > +#ifdef HAVE_SYS_MMAN_H > + init_mman(); > +#endif > #ifdef HAVE_POSIX > scm_tc16_dir =3D scm_make_smob_type ("directory", 0); > scm_set_smob_free (scm_tc16_dir, scm_dir_free); > --- libguile/mman.c.orig 2017-10-28 10:05:10.000000000 -0700 > +++ libguile/mman.c 2017-11-04 09:23:35.000000000 -0700 > @@ -0,0 +1,199 @@ > +// mman.c - v171104a > +#ifdef HAVE_CONFIG_H > +# include > +#endif > + > +#ifdef HAVE_SYS_MMAN_H > +# include > +# include > +#endif > + > +#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MAP_ANONYMOUS) > + > +#include "libguile/_scm.h" > +#include "libguile/smob.h" > +#include "libguile/fdes-finalizers.h" > +#include "libguile/feature.h" > + > +SCM_API SCM scm_mmap_search (SCM addr, SCM len, SCM prot, SCM flags, = SCM fd, > + SCM offset); > +SCM_API SCM scm_mmap (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, > + SCM offset); > +SCM_API SCM scm_munmap (SCM bvec); > +void init_mman(void); > +static void mmap_finalizer (void *ptr, void *data); > + > +SCM_DEFINE (scm_mmap_search, "mmap/search", 2, 4, 0, > + (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, SCM = offset), > + "mmap addr len [prot [flags [fd [offset]]]]" > + "See the unix man page for mmap. Returns a bytevector." > + "Note that the region allocated will be searched by the = garbage" > + "collector for pointers. \n" > + " Defaults:\n" > + " PROT (logior PROT_READ PROT_WRITE)\n" > + " FLAGS (logior MAP_ANON MAP_PRIVATE)\n" > + " FD -1\n" > + " OFFSET 0\n" > + "@example\n(define reg (mmap/search %null-pointer = #x1000)\n" > + "@end example" > + ) > +#define FUNC_NAME s_scm_mmap_search > +{ > + void *c_mem, *c_addr; > + size_t c_len; > + int c_prot, c_flags, c_fd; > + scm_t_off c_offset; > + SCM pointer, bvec; > + > + if (SCM_POINTER_P (addr)) > + c_addr =3D SCM_POINTER_VALUE (addr); > + else if (scm_is_integer (addr)) > + c_addr =3D (void*) scm_to_uintptr_t (addr); > + else > + SCM_MISC_ERROR("bad addr", addr); > + > + c_len =3D scm_to_size_t (len); > + > + if (SCM_UNBNDP (prot)) > + c_prot =3D PROT_READ | PROT_WRITE; > + else > + c_prot =3D scm_to_int (prot); > + > + if (SCM_UNBNDP (flags)) > + c_flags =3D MAP_ANON | MAP_PRIVATE; > + else > + c_flags =3D scm_to_int (flags); > + > + if (SCM_UNBNDP (fd)) > + c_fd =3D -1; > + else > + c_fd =3D scm_to_int (fd); > + > + if (SCM_UNBNDP (fd)) > + c_offset =3D 0; > + else > + c_offset =3D scm_to_off_t (offset); > + > + c_mem =3D mmap(c_addr, c_len, c_prot, c_flags, c_fd, c_offset); > + if (c_mem =3D=3D MAP_FAILED) > + SCM_SYSERROR; /* errno set */ > + > + pointer =3D scm_cell (scm_tc7_pointer, (scm_t_bits) c_mem); > + bvec =3D scm_c_take_typed_bytevector((signed char *) c_mem + = c_offset, c_len, > + SCM_ARRAY_ELEMENT_TYPE_VU8, = pointer); > + /* if sizeof(void*) < sizeof(size_t) we are in trouble: */ > + scm_i_set_finalizer (SCM2PTR (bvec), mmap_finalizer, (void*) = c_len); > + return bvec; > +} > +#undef FUNC_NAME > + > +SCM_DEFINE (scm_mmap, "mmap", 2, 4, 0, > + (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, SCM = offset), > + "mmap addr len [prot [flags [fd [offset]]]]" > + "See the man page. Returns a bytevector." > + "Note that the region returned by mmap will NOT be = searched " > + "by the garbage collector for pointers.\n" > + "Defaults:\n" > + " PROT (logior PROT_READ PROT_WRITE)\n" > + " FLAGS (logior MAP_ANON MAP_PRIVATE)\n" > + " FD -1\n" > + " OFFSET 0\n" > + "@example\n" > + "(define bvec-1MB (mmap 0 #x100000)\n" > + "@end example" > + ) > +#define FUNC_NAME s_scm_mmap > +{ > + SCM bvec; > + void *c_mem; > + size_t c_len; > + > + bvec =3D scm_mmap_search(addr, len, prot, flags, fd, offset); > + c_mem =3D SCM_BYTEVECTOR_CONTENTS(bvec); > + c_len =3D SCM_BYTEVECTOR_LENGTH(bvec); > + > + /* tell GC not to scan for pointers */ > + GC_exclude_static_roots(c_mem, (char*) c_mem + c_len); > + > + return bvec; > +} > +static void > +mmap_finalizer (void *ptr, void *data) > +{ > + void *c_addr; > + intptr_t c_len; > + int res; > + > + c_addr =3D (void *) SCM_POINTER_VALUE (SCM_PACK_POINTER (ptr)); > + c_len =3D (intptr_t) data; > + res =3D munmap(c_addr, c_len); > + if (res !=3D 0) SCM_SYSERROR; > +} > +#undef FUNC_NAME > + > +SCM_DEFINE (scm_munmap, "munmap", 1, 0, 0, > + (SCM bvec), > + "See the man page. Given bytevector unmap." > + ) > +#define FUNC_NAME s_scm_munmap > +{ > + void *c_addr; > + size_t c_len; > + int c_res; > + > + SCM_VALIDATE_BYTEVECTOR (1, bvec); > + > + c_addr =3D (void *) SCM_BYTEVECTOR_CONTENTS (bvec); > + c_len =3D SCM_BYTEVECTOR_LENGTH (bvec); > + > + c_res =3D munmap(c_addr, c_len); > + if (c_res =3D=3D -1) > + SCM_SYSERROR; /* errno set */ > + > + // TODO: clean up bytevector > + return SCM_UNSPECIFIED; > +} > +#undef FUNC_NAME > + > +void init_mman(void) { > +#ifdef PROT_NONE > + scm_c_define ("PROT_NONE", scm_from_int (PROT_NONE)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_READ", scm_from_int (PROT_READ)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_WRITE", scm_from_int (PROT_WRITE)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_EXEC", scm_from_int (PROT_EXEC)); > +#endif > + > +#ifdef MAP_ANONYMOUS > + scm_c_define ("MAP_ANONYMOUS", scm_from_int (MAP_ANONYMOUS)); > +#endif > +#ifdef MAP_ANON > + scm_c_define ("MAP_ANON", scm_from_int (MAP_ANON)); > +#endif > +#ifdef MAP_FILE > + scm_c_define ("MAP_FILE", scm_from_int (MAP_FILE)); > +#endif > +#ifdef MAP_FIXED > + scm_c_define ("MAP_FIXED", scm_from_int (MAP_FIXED)); > +#endif > +#ifdef MAP_HASSEMAPHORE > + scm_c_define ("MAP_HASSEMAPHORE", scm_from_int (MAP_HASSEMAPHORE)); > +#endif > +#ifdef MAP_PRIVATE > + scm_c_define ("MAP_PRIVATE", scm_from_int (MAP_PRIVATE)); > +#endif > +#ifdef MAP_SHARED > + scm_c_define ("MAP_SHARED", scm_from_int (MAP_SHARED)); > +#endif > +#ifdef MAP_NOCACHE > + scm_c_define ("MAP_NOCACHE", scm_from_int (MAP_NOCACHE)); > +#endif > + scm_c_define ("PAGE_SIZE", scm_from_int (getpagesize())); > +} > + > +#endif /* HAVE_SYS_MMAN_H */ >=20 >=20 >=20 >=20 --Apple-Mail=_705C18C9-0341-466A-9392-6E7A4A94B270 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 got it.

On Nov 24, 2017, at 8:22 AM, = Nala Ginrut <nalaginrut@gmail.com> wrote:

Thanks for the work! Could you please add MAP_POPULATE too?

2017=E5=B9=B411=E6=9C=8824=E6=97=A5 = =E4=B8=8B=E5=8D=8811:55=EF=BC=8C"Matt Wette" <matt.wette@gmail.com>=E5=86=99=E9=81=93=EF=BC=9A





I did a little more on this.  Here is the latest.
It provides mmap (not searched) and mmap/search (searched for pointers = to GC).


--- libguile/filesys.c.orig     2017-03-01 = 10:54:31.000000000 -0800
+++ libguile/filesys.c  2017-10-28 10:05:10.000000000 -0700
@@ -1828,9 +1828,14 @@



+#include "mman.c"
+
 void
 scm_init_filesys ()
 {
+#ifdef HAVE_SYS_MMAN_H
+  init_mman();
+#endif
 #ifdef HAVE_POSIX
   scm_tc16_dir =3D scm_make_smob_type ("directory", 0);
   scm_set_smob_free (scm_tc16_dir, scm_dir_free);
--- libguile/mman.c.orig        2017-10-28 = 10:05:10.000000000 -0700
+++ libguile/mman.c     2017-11-04 09:23:35.000000000 = -0700
@@ -0,0 +1,199 @@
+// mman.c - v171104a
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#ifdef HAVE_SYS_MMAN_H
+#  include <sys/mman.h>
+#  include <errno.h>
+#endif
+
+#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MAP_ANONYMOUS)
+
+#include "libguile/_scm.h"
+#include "libguile/smob.h"
+#include "libguile/fdes-finalizers.h"
+#include "libguile/feature.h"
+
+SCM_API SCM scm_mmap_search (SCM addr, SCM len, SCM prot, SCM flags, = SCM fd,
+                    =         SCM offset);
+SCM_API SCM scm_mmap (SCM addr, SCM len, SCM prot, SCM flags, SCM = fd,
+                    =  SCM offset);
+SCM_API SCM scm_munmap (SCM bvec);
+void init_mman(void);
+static void mmap_finalizer (void *ptr, void *data);
+
+SCM_DEFINE (scm_mmap_search, "mmap/search", 2, 4, 0,
+            (SCM addr, SCM len, SCM prot, = SCM flags, SCM fd, SCM offset),
+           "mmap addr len [prot [flags = [fd [offset]]]]"
+           "See the unix man page for = mmap.  Returns a bytevector."
+           "Note that the region = allocated will be searched by the garbage"
+           "collector for pointers.  = \n"
+           " Defaults:\n"
+           "  PROT  =  (logior PROT_READ PROT_WRITE)\n"
+           "  FLAGS  (logior = MAP_ANON MAP_PRIVATE)\n"
+           "  FD    =  -1\n"
+           "  OFFSET 0\n"
+           "@example\n(define reg = (mmap/search %null-pointer #x1000)\n"
+           "@end example"
+           )
+#define FUNC_NAME s_scm_mmap_search
+{
+  void *c_mem, *c_addr;
+  size_t c_len;
+  int c_prot, c_flags, c_fd;
+  scm_t_off c_offset;
+  SCM pointer, bvec;
+
+  if (SCM_POINTER_P (addr))
+    c_addr =3D SCM_POINTER_VALUE (addr);
+  else if (scm_is_integer (addr))
+    c_addr =3D (void*) scm_to_uintptr_t (addr);
+  else
+    SCM_MISC_ERROR("bad addr", addr);
+
+  c_len =3D scm_to_size_t (len);
+
+  if (SCM_UNBNDP (prot))
+    c_prot =3D PROT_READ | PROT_WRITE;
+  else
+    c_prot =3D scm_to_int (prot);
+
+  if (SCM_UNBNDP (flags))
+    c_flags =3D MAP_ANON | MAP_PRIVATE;
+  else
+    c_flags =3D scm_to_int (flags);
+
+  if (SCM_UNBNDP (fd))
+    c_fd =3D -1;
+  else
+    c_fd =3D scm_to_int (fd);
+
+  if (SCM_UNBNDP (fd))
+    c_offset =3D 0;
+  else
+    c_offset =3D scm_to_off_t (offset);
+
+  c_mem =3D mmap(c_addr, c_len, c_prot, c_flags, c_fd, = c_offset);
+  if (c_mem =3D=3D MAP_FAILED)
+    SCM_SYSERROR;            =           /* errno set */
+
+  pointer =3D scm_cell (scm_tc7_pointer, (scm_t_bits) c_mem);
+  bvec =3D scm_c_take_typed_bytevector((signed = char *) c_mem + c_offset, c_len,
+                    =                 = SCM_ARRAY_ELEMENT_TYPE_VU8, pointer);
+  /* if sizeof(void*) < sizeof(size_t) we are in trouble: */
+  scm_i_set_finalizer (SCM2PTR (bvec), mmap_finalizer, (void*) = c_len);
+  return bvec;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_mmap, "mmap", 2, 4, 0,
+            (SCM addr, SCM len, SCM prot, = SCM flags, SCM fd, SCM offset),
+           "mmap addr len [prot [flags = [fd [offset]]]]"
+           "See the man page.  = Returns a bytevector."
+           "Note that the region returned = by mmap will NOT be searched "
+           "by the garbage collector for = pointers.\n"
+           "Defaults:\n"
+           "  PROT  =  (logior PROT_READ PROT_WRITE)\n"
+           "  FLAGS  (logior = MAP_ANON MAP_PRIVATE)\n"
+           "  FD    =  -1\n"
+           "  OFFSET 0\n"
+           "@example\n"
+           "(define bvec-1MB (mmap 0 = #x100000)\n"
+           "@end example"
+           )
+#define FUNC_NAME s_scm_mmap
+{
+  SCM bvec;
+  void *c_mem;
+  size_t c_len;
+
+  bvec =3D scm_mmap_search(addr, len, prot, flags, fd, offset);
+  c_mem =3D SCM_BYTEVECTOR_CONTENTS(bvec);
+  c_len =3D SCM_BYTEVECTOR_LENGTH(bvec);
+
+  /* tell GC not to scan for pointers */
+  GC_exclude_static_roots(c_mem, (char*) c_mem + c_len);
+
+  return bvec;
+}
+static void
+mmap_finalizer (void *ptr, void *data)
+{
+  void *c_addr;
+  intptr_t c_len;
+  int res;
+
+  c_addr =3D (void *) SCM_POINTER_VALUE (SCM_PACK_POINTER = (ptr));
+  c_len =3D (intptr_t) data;
+  res =3D munmap(c_addr, c_len);
+  if (res !=3D 0) SCM_SYSERROR;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_munmap, "munmap", 1, 0, 0,
+            (SCM bvec),
+           "See the man page. Given = bytevector unmap."
+           )
+#define FUNC_NAME s_scm_munmap
+{
+  void *c_addr;
+  size_t c_len;
+  int c_res;
+
+  SCM_VALIDATE_BYTEVECTOR (1, bvec);
+
+  c_addr =3D (void *) SCM_BYTEVECTOR_CONTENTS (bvec);
= +  c_len =3D SCM_BYTEVECTOR_LENGTH (bvec);
+
+  c_res =3D munmap(c_addr, c_len);
+  if (c_res =3D=3D -1)
+    SCM_SYSERROR;            =           /* errno set */
+
+  // TODO: clean up bytevector
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+void init_mman(void) {
+#ifdef PROT_NONE
+  scm_c_define ("PROT_NONE", scm_from_int (PROT_NONE));
+#endif
+#ifdef PROT_
+  scm_c_define ("PROT_READ", scm_from_int (PROT_READ));
+#endif
+#ifdef PROT_
+  scm_c_define ("PROT_WRITE", scm_from_int (PROT_WRITE));
+#endif
+#ifdef PROT_
+  scm_c_define ("PROT_EXEC", scm_from_int (PROT_EXEC));
+#endif
+
+#ifdef MAP_ANONYMOUS
+  scm_c_define ("MAP_ANONYMOUS", scm_from_int (MAP_ANONYMOUS));
+#endif
+#ifdef MAP_ANON
+  scm_c_define ("MAP_ANON", scm_from_int (MAP_ANON));
= +#endif
+#ifdef MAP_FILE
+  scm_c_define ("MAP_FILE", scm_from_int (MAP_FILE));
= +#endif
+#ifdef MAP_FIXED
+  scm_c_define ("MAP_FIXED", scm_from_int (MAP_FIXED));
+#endif
+#ifdef MAP_HASSEMAPHORE
+  scm_c_define ("MAP_HASSEMAPHORE", scm_from_int = (MAP_HASSEMAPHORE));
+#endif
+#ifdef MAP_PRIVATE
+  scm_c_define ("MAP_PRIVATE", scm_from_int (MAP_PRIVATE));
+#endif
+#ifdef MAP_SHARED
+  scm_c_define ("MAP_SHARED", scm_from_int (MAP_SHARED));
+#endif
+#ifdef MAP_NOCACHE
+  scm_c_define ("MAP_NOCACHE", scm_from_int (MAP_NOCACHE));
+#endif
+  scm_c_define ("PAGE_SIZE", scm_from_int (getpagesize()));
+}
+
+#endif /* HAVE_SYS_MMAN_H */





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