X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/e6e2e95aa53f876e25bee2b0f867350c4a2ddf7a..4af0d97ee65f298be33d5959cd36a5bea8797be9:/libguile/srcprop.c diff --git a/libguile/srcprop.c b/libguile/srcprop.c dissimilarity index 72% index 1b9aa2bbe..c632bb0c5 100644 --- a/libguile/srcprop.c +++ b/libguile/srcprop.c @@ -1,361 +1,389 @@ -/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, - * Boston, MA 02111-1307 USA - * - * As a special exception, the Free Software Foundation gives permission - * for additional uses of the text contained in its release of GUILE. - * - * The exception is that, if you link the GUILE library with other files - * to produce an executable, this does not by itself cause the - * resulting executable to be covered by the GNU General Public License. - * Your use of that executable is in no way restricted on account of - * linking the GUILE library code into it. - * - * This exception does not however invalidate any other reasons why - * the executable file might be covered by the GNU General Public License. - * - * This exception applies only to the code released by the - * Free Software Foundation under the name GUILE. If you copy - * code from other Free Software Foundation releases into a copy of - * GUILE, as the General Public License permits, the exception does - * not apply to the code that you add in this way. To avoid misleading - * anyone as to the status of such modified files, you must delete - * this exception notice from them. - * - * If you write modifications of your own for GUILE, it is your choice - * whether to permit this exception to apply to your modifications. - * If you do not wish that, delete this exception notice. - * - * The author can be reached at djurfeldt@nada.kth.se - * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */ - -/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, - gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ - - - -#include - -#include "libguile/_scm.h" -#include "libguile/smob.h" -#include "libguile/alist.h" -#include "libguile/debug.h" -#include "libguile/hashtab.h" -#include "libguile/hash.h" -#include "libguile/ports.h" -#include "libguile/root.h" -#include "libguile/weaks.h" - -#include "libguile/validate.h" -#include "libguile/srcprop.h" - -/* {Source Properties} - * - * Properties of source list expressions. - * Five of these have special meaning and optimized storage: - * - * filename string The name of the source file. - * copy list A copy of the list expression. - * line integer The source code line number. - * column integer The source code column number. - * breakpoint boolean Sets a breakpoint on this form. - * - * Most properties above can be set by the reader. - * - */ - -SCM_GLOBAL_SYMBOL (scm_sym_filename, "filename"); -SCM_GLOBAL_SYMBOL (scm_sym_copy, "copy"); -SCM_GLOBAL_SYMBOL (scm_sym_line, "line"); -SCM_GLOBAL_SYMBOL (scm_sym_column, "column"); -SCM_GLOBAL_SYMBOL (scm_sym_breakpoint, "breakpoint"); - -scm_bits_t scm_tc16_srcprops; -static scm_srcprops_chunk *srcprops_chunklist = 0; -static scm_srcprops *srcprops_freelist = 0; - - -static SCM -srcprops_mark (SCM obj) -{ - scm_gc_mark (SRCPROPFNAME (obj)); - scm_gc_mark (SRCPROPCOPY (obj)); - return SRCPROPPLIST (obj); -} - - -static scm_sizet -srcprops_free (SCM obj) -{ - *((scm_srcprops **) SCM_CELL_WORD_1 (obj)) = srcprops_freelist; - srcprops_freelist = (scm_srcprops *) SCM_CELL_WORD_1 (obj); - return 0; /* srcprops_chunks are not freed until leaving guile */ -} - - -static int -srcprops_print (SCM obj, SCM port, scm_print_state *pstate) -{ - int writingp = SCM_WRITINGP (pstate); - scm_puts ("#', port); - return 1; -} - - -SCM -scm_make_srcprops (int line, int col, SCM filename, SCM copy, SCM plist) -{ - register scm_srcprops *ptr; - SCM_DEFER_INTS; - if ((ptr = srcprops_freelist) != NULL) - srcprops_freelist = *(scm_srcprops **)ptr; - else - { - int i; - scm_srcprops_chunk *mem; - scm_sizet n = sizeof (scm_srcprops_chunk) - + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1); - SCM_SYSCALL (mem = (scm_srcprops_chunk *) malloc (n)); - if (mem == NULL) - scm_memory_error ("srcprops"); - scm_mallocated += n; - mem->next = srcprops_chunklist; - srcprops_chunklist = mem; - ptr = &mem->srcprops[0]; - for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i) - *(scm_srcprops **)&ptr[i] = &ptr[i + 1]; - *(scm_srcprops **)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0; - srcprops_freelist = (scm_srcprops *) &ptr[1]; - } - ptr->pos = SRCPROPMAKPOS (line, col); - ptr->fname = filename; - ptr->copy = copy; - ptr->plist = plist; - SCM_RETURN_NEWSMOB (scm_tc16_srcprops, ptr); -} - - -SCM -scm_srcprops_to_plist (SCM obj) -{ - SCM plist = SRCPROPPLIST (obj); - if (!SCM_UNBNDP (SRCPROPCOPY (obj))) - plist = scm_acons (scm_sym_copy, SRCPROPCOPY (obj), plist); - if (!SCM_UNBNDP (SRCPROPFNAME (obj))) - plist = scm_acons (scm_sym_filename, SRCPROPFNAME (obj), plist); - plist = scm_acons (scm_sym_column, SCM_MAKINUM (SRCPROPCOL (obj)), plist); - plist = scm_acons (scm_sym_line, SCM_MAKINUM (SRCPROPLINE (obj)), plist); - plist = scm_acons (scm_sym_breakpoint, SRCPROPBRK (obj), plist); - return plist; -} - -SCM_DEFINE (scm_source_properties, "source-properties", 1, 0, 0, - (SCM obj), - "Return the source property association list of @var{obj}.") -#define FUNC_NAME s_scm_source_properties -{ - SCM p; - SCM_VALIDATE_NIM (1,obj); - if (SCM_MEMOIZEDP (obj)) - obj = SCM_MEMOIZED_EXP (obj); -#ifndef SCM_RECKLESS - else if (SCM_NCONSP (obj)) - SCM_WRONG_TYPE_ARG (1, obj); -#endif - p = scm_hashq_ref (scm_source_whash, obj, SCM_BOOL_F); - if (SRCPROPSP (p)) - return scm_srcprops_to_plist (p); - return SCM_EOL; -} -#undef FUNC_NAME - -/* Perhaps this procedure should look through an alist - and try to make a srcprops-object...? */ -SCM_DEFINE (scm_set_source_properties_x, "set-source-properties!", 2, 0, 0, - (SCM obj, SCM plist), - "Install the association list @var{plist} as the source property\n" - "list for @var{obj}.") -#define FUNC_NAME s_scm_set_source_properties_x -{ - SCM handle; - SCM_VALIDATE_NIM (1,obj); - if (SCM_MEMOIZEDP (obj)) - obj = SCM_MEMOIZED_EXP (obj); -#ifndef SCM_RECKLESS - else if (SCM_NCONSP (obj)) - SCM_WRONG_TYPE_ARG(1, obj); -#endif - handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist); - SCM_SETCDR (handle, plist); - return plist; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_source_property, "source-property", 2, 0, 0, - (SCM obj, SCM key), - "Return the source property specified by @var{key} from\n" - "@var{obj}'s source property list.") -#define FUNC_NAME s_scm_source_property -{ - SCM p; - SCM_VALIDATE_NIM (1,obj); - if (SCM_MEMOIZEDP (obj)) - obj = SCM_MEMOIZED_EXP (obj); -#ifndef SCM_RECKLESS - else if (SCM_NECONSP (obj)) - SCM_WRONG_TYPE_ARG (1, obj); -#endif - p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); - if (SCM_IMP (p) || !SRCPROPSP (p)) - goto plist; - if (SCM_EQ_P (scm_sym_breakpoint, key)) p = SRCPROPBRK (p); - else if (SCM_EQ_P (scm_sym_line, key)) p = SCM_MAKINUM (SRCPROPLINE (p)); - else if (SCM_EQ_P (scm_sym_column, key)) p = SCM_MAKINUM (SRCPROPCOL (p)); - else if (SCM_EQ_P (scm_sym_filename, key)) p = SRCPROPFNAME (p); - else if (SCM_EQ_P (scm_sym_copy, key)) p = SRCPROPCOPY (p); - else - { - p = SRCPROPPLIST (p); - plist: - p = scm_assoc (key, p); - return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F); - } - return SCM_UNBNDP (p) ? SCM_BOOL_F : p; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_set_source_property_x, "set-source-property!", 3, 0, 0, - (SCM obj, SCM key, SCM datum), - "Set the source property of object @var{obj}, which is specified by\n" - "@var{key} to @var{datum}. Normally, the key will be a symbol.") -#define FUNC_NAME s_scm_set_source_property_x -{ - scm_whash_handle h; - SCM p; - SCM_VALIDATE_NIM (1,obj); - if (SCM_MEMOIZEDP (obj)) - obj = SCM_MEMOIZED_EXP (obj); -#ifndef SCM_RECKLESS - else if (SCM_NCONSP (obj)) - SCM_WRONG_TYPE_ARG (1, obj); -#endif - h = scm_whash_get_handle (scm_source_whash, obj); - if (SCM_WHASHFOUNDP (h)) - p = SCM_WHASHREF (scm_source_whash, h); - else - { - h = scm_whash_create_handle (scm_source_whash, obj); - p = SCM_EOL; - } - if (SCM_EQ_P (scm_sym_breakpoint, key)) - { - if (SRCPROPSP (p)) - { - if (SCM_FALSEP (datum)) - CLEARSRCPROPBRK (p); - else - SETSRCPROPBRK (p); - } - else - { - SCM sp = scm_make_srcprops (0, 0, SCM_UNDEFINED, SCM_UNDEFINED, p); - SCM_WHASHSET (scm_source_whash, h, sp); - if (SCM_FALSEP (datum)) - CLEARSRCPROPBRK (sp); - else - SETSRCPROPBRK (sp); - } - } - else if (SCM_EQ_P (scm_sym_line, key)) - { - SCM_VALIDATE_INUM (3,datum); - if (SRCPROPSP (p)) - SETSRCPROPLINE (p, SCM_INUM (datum)); - else - SCM_WHASHSET (scm_source_whash, h, - scm_make_srcprops (SCM_INUM (datum), 0, - SCM_UNDEFINED, SCM_UNDEFINED, p)); - } - else if (SCM_EQ_P (scm_sym_column, key)) - { - SCM_VALIDATE_INUM (3,datum); - if (SRCPROPSP (p)) - SETSRCPROPCOL (p, SCM_INUM (datum)); - else - SCM_WHASHSET (scm_source_whash, h, - scm_make_srcprops (0, SCM_INUM (datum), - SCM_UNDEFINED, SCM_UNDEFINED, p)); - } - else if (SCM_EQ_P (scm_sym_filename, key)) - { - if (SRCPROPSP (p)) - SRCPROPFNAME (p) = datum; - else - SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p)); - } - else if (SCM_EQ_P (scm_sym_copy, key)) - { - if (SRCPROPSP (p)) - SRCPROPCOPY (p) = datum; - else - SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p)); - } - else - SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p)); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - - -void -scm_init_srcprop () -{ - scm_tc16_srcprops = scm_make_smob_type ("srcprops", 0); - scm_set_smob_mark (scm_tc16_srcprops, srcprops_mark); - scm_set_smob_free (scm_tc16_srcprops, srcprops_free); - scm_set_smob_print (scm_tc16_srcprops, srcprops_print); - - scm_source_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (2047)); - scm_sysintern ("source-whash", scm_source_whash); - -#ifndef SCM_MAGIC_SNARFER -#include "libguile/srcprop.x" -#endif -} - -void -scm_finish_srcprop () -{ - register scm_srcprops_chunk *ptr = srcprops_chunklist, *next; - while (ptr) - { - next = ptr->next; - free ((char *) ptr); - scm_mallocated -= sizeof (scm_srcprops_chunk) - + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1); - ptr = next; - } -} - -/* - Local Variables: - c-file-style: "gnu" - End: -*/ +/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2006, + * 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 3 of + * the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + + + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include + +#include "libguile/_scm.h" +#include "libguile/async.h" +#include "libguile/smob.h" +#include "libguile/alist.h" +#include "libguile/debug.h" +#include "libguile/hashtab.h" +#include "libguile/hash.h" +#include "libguile/ports.h" +#include "libguile/root.h" +#include "libguile/weaks.h" +#include "libguile/gc.h" + +#include "libguile/validate.h" +#include "libguile/srcprop.h" +#include "libguile/private-options.h" + + +/* {Source Properties} + * + * Properties of source list expressions. + * Four of these have special meaning: + * + * filename string The name of the source file. + * copy list A copy of the list expression. + * line integer The source code line number. + * column integer The source code column number. + * + * Most properties above can be set by the reader. + * + */ + +SCM_GLOBAL_SYMBOL (scm_sym_filename, "filename"); +SCM_GLOBAL_SYMBOL (scm_sym_copy, "copy"); +SCM_GLOBAL_SYMBOL (scm_sym_line, "line"); +SCM_GLOBAL_SYMBOL (scm_sym_column, "column"); + +static SCM scm_source_whash; +static scm_i_pthread_mutex_t source_lock = SCM_I_PTHREAD_MUTEX_INITIALIZER; + + +/* + * Source properties are stored as double cells with the + * following layout: + + * car = tag + * cbr = pos + * ccr = copy + * cdr = alist + */ + +#define SRCPROPSP(p) (SCM_SMOB_PREDICATE (scm_tc16_srcprops, (p))) +#define SRCPROPPOS(p) (SCM_SMOB_DATA(p)) +#define SRCPROPLINE(p) (SRCPROPPOS(p) >> 12) +#define SRCPROPCOL(p) (SRCPROPPOS(p) & 0x0fffL) +#define SRCPROPCOPY(p) (SCM_SMOB_OBJECT_2(p)) +#define SRCPROPALIST(p) (SCM_SMOB_OBJECT_3(p)) +#define SRCPROPMAKPOS(l, c) (((l) << 12) + (c)) +#define SETSRCPROPPOS(p, l, c) (SCM_SET_SMOB_DATA_1 (p, SRCPROPMAKPOS (l, c))) +#define SETSRCPROPLINE(p, l) SETSRCPROPPOS (p, l, SRCPROPCOL (p)) +#define SETSRCPROPCOL(p, c) SETSRCPROPPOS (p, SRCPROPLINE (p), c) +#define SETSRCPROPCOPY(p, c) (SCM_SET_SMOB_OBJECT_2 (p, c)) +#define SETSRCPROPALIST(p, l) (SCM_SET_SMOB_OBJECT_3 (p, l)) + + +static SCM scm_srcprops_to_alist (SCM obj); + + +scm_t_bits scm_tc16_srcprops; + + +static int +supports_source_props (SCM obj) +{ + return SCM_NIMP (obj) && !scm_is_symbol (obj) && !scm_is_keyword (obj); +} + + +static int +srcprops_print (SCM obj, SCM port, scm_print_state *pstate) +{ + int writingp = SCM_WRITINGP (pstate); + scm_puts ("#', port); + return 1; +} + + +/* + * We remember the last file name settings, so we can share that alist + * entry. This works because scm_set_source_property_x does not use + * assoc-set! for modifying the alist. + * + * This variable contains a protected cons, whose cdr is the cached + * alist + */ +static SCM scm_last_alist_filename; + +SCM +scm_make_srcprops (long line, int col, SCM filename, SCM copy, SCM alist) +{ + if (!SCM_UNBNDP (filename)) + { + SCM old_alist = alist; + + /* + have to extract the acons, and operate on that, for + thread safety. + */ + SCM last_acons = SCM_CDR (scm_last_alist_filename); + if (scm_is_null (old_alist) + && scm_is_eq (SCM_CDAR (last_acons), filename)) + { + alist = last_acons; + } + else + { + alist = scm_acons (scm_sym_filename, filename, alist); + if (scm_is_null (old_alist)) + SCM_SETCDR (scm_last_alist_filename, alist); + } + } + + SCM_RETURN_NEWSMOB3 (scm_tc16_srcprops, + SRCPROPMAKPOS (line, col), + SCM_UNPACK (copy), + SCM_UNPACK (alist)); +} + + +static SCM +scm_srcprops_to_alist (SCM obj) +{ + SCM alist = SRCPROPALIST (obj); + if (!SCM_UNBNDP (SRCPROPCOPY (obj))) + alist = scm_acons (scm_sym_copy, SRCPROPCOPY (obj), alist); + alist = scm_acons (scm_sym_column, scm_from_int (SRCPROPCOL (obj)), alist); + alist = scm_acons (scm_sym_line, scm_from_int (SRCPROPLINE (obj)), alist); + return alist; +} + +SCM_DEFINE (scm_supports_source_properties_p, "supports-source-properties?", 1, 0, 0, + (SCM obj), + "Return #t if @var{obj} supports adding source properties,\n" + "otherwise return #f.") +#define FUNC_NAME s_scm_supports_source_properties_p +{ + return scm_from_bool (supports_source_props (obj)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_source_properties, "source-properties", 1, 0, 0, + (SCM obj), + "Return the source property association list of @var{obj}.") +#define FUNC_NAME s_scm_source_properties +{ + if (SCM_IMP (obj)) + return SCM_EOL; + else + { + SCM p; + + scm_i_pthread_mutex_lock (&source_lock); + p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); + scm_i_pthread_mutex_unlock (&source_lock); + + if (SRCPROPSP (p)) + return scm_srcprops_to_alist (p); + else + /* list from set-source-properties!, or SCM_EOL for not found */ + return p; + } +} +#undef FUNC_NAME + +/* Perhaps this procedure should look through an alist + and try to make a srcprops-object...? */ +SCM_DEFINE (scm_set_source_properties_x, "set-source-properties!", 2, 0, 0, + (SCM obj, SCM alist), + "Install the association list @var{alist} as the source property\n" + "list for @var{obj}.") +#define FUNC_NAME s_scm_set_source_properties_x +{ + SCM_VALIDATE_NIM (1, obj); + + scm_i_pthread_mutex_lock (&source_lock); + scm_hashq_set_x (scm_source_whash, obj, alist); + scm_i_pthread_mutex_unlock (&source_lock); + + return alist; +} +#undef FUNC_NAME + +int +scm_i_has_source_properties (SCM obj) +#define FUNC_NAME "%set-source-properties" +{ + if (SCM_IMP (obj)) + return 0; + else + { + int ret; + + scm_i_pthread_mutex_lock (&source_lock); + ret = scm_is_true (scm_hashq_ref (scm_source_whash, obj, SCM_BOOL_F)); + scm_i_pthread_mutex_unlock (&source_lock); + + return ret; + } +} +#undef FUNC_NAME + + +void +scm_i_set_source_properties_x (SCM obj, long line, int col, SCM fname) +#define FUNC_NAME "%set-source-properties" +{ + SCM_VALIDATE_NIM (1, obj); + + scm_i_pthread_mutex_lock (&source_lock); + scm_hashq_set_x (scm_source_whash, obj, + scm_make_srcprops (line, col, fname, + SCM_COPY_SOURCE_P + ? scm_copy_tree (obj) + : SCM_UNDEFINED, + SCM_EOL)); + scm_i_pthread_mutex_unlock (&source_lock); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_source_property, "source-property", 2, 0, 0, + (SCM obj, SCM key), + "Return the source property specified by @var{key} from\n" + "@var{obj}'s source property list.") +#define FUNC_NAME s_scm_source_property +{ + if (SCM_IMP (obj)) + return SCM_BOOL_F; + else + { + SCM p; + + scm_i_pthread_mutex_lock (&source_lock); + p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); + scm_i_pthread_mutex_unlock (&source_lock); + + if (!SRCPROPSP (p)) + goto alist; + if (scm_is_eq (scm_sym_line, key)) + p = scm_from_int (SRCPROPLINE (p)); + else if (scm_is_eq (scm_sym_column, key)) + p = scm_from_int (SRCPROPCOL (p)); + else if (scm_is_eq (scm_sym_copy, key)) + p = SRCPROPCOPY (p); + else + { + p = SRCPROPALIST (p); + alist: + p = scm_assoc (key, p); + return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F); + } + return SCM_UNBNDP (p) ? SCM_BOOL_F : p; + } +} +#undef FUNC_NAME + +SCM_DEFINE (scm_set_source_property_x, "set-source-property!", 3, 0, 0, + (SCM obj, SCM key, SCM datum), + "Set the source property of object @var{obj}, which is specified by\n" + "@var{key} to @var{datum}. Normally, the key will be a symbol.") +#define FUNC_NAME s_scm_set_source_property_x +{ + SCM p; + SCM_VALIDATE_NIM (1, obj); + + scm_i_pthread_mutex_lock (&source_lock); + p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); + + if (scm_is_eq (scm_sym_line, key)) + { + if (SRCPROPSP (p)) + SETSRCPROPLINE (p, scm_to_int (datum)); + else + scm_hashq_set_x (scm_source_whash, obj, + scm_make_srcprops (scm_to_int (datum), 0, + SCM_UNDEFINED, SCM_UNDEFINED, p)); + } + else if (scm_is_eq (scm_sym_column, key)) + { + if (SRCPROPSP (p)) + SETSRCPROPCOL (p, scm_to_int (datum)); + else + scm_hashq_set_x (scm_source_whash, obj, + scm_make_srcprops (0, scm_to_int (datum), + SCM_UNDEFINED, SCM_UNDEFINED, p)); + } + else if (scm_is_eq (scm_sym_copy, key)) + { + if (SRCPROPSP (p)) + SETSRCPROPCOPY (p, datum); + else + scm_hashq_set_x (scm_source_whash, obj, + scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p)); + } + else + { + if (SRCPROPSP (p)) + SETSRCPROPALIST (p, scm_acons (key, datum, SRCPROPALIST (p))); + else + scm_hashq_set_x (scm_source_whash, obj, + scm_acons (key, datum, p)); + } + scm_i_pthread_mutex_unlock (&source_lock); + + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + + +SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, + (SCM xorig, SCM x, SCM y), + "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" + "Any source properties associated with @var{xorig} are also associated\n" + "with the new pair.") +#define FUNC_NAME s_scm_cons_source +{ + SCM p, z; + z = scm_cons (x, y); + scm_i_pthread_mutex_lock (&source_lock); + /* Copy source properties possibly associated with xorig. */ + p = scm_hashq_ref (scm_source_whash, xorig, SCM_BOOL_F); + if (scm_is_true (p)) + scm_hashq_set_x (scm_source_whash, z, p); + scm_i_pthread_mutex_unlock (&source_lock); + return z; +} +#undef FUNC_NAME + + +void +scm_init_srcprop () +{ + scm_tc16_srcprops = scm_make_smob_type ("srcprops", 0); + scm_set_smob_print (scm_tc16_srcprops, srcprops_print); + + scm_source_whash = scm_make_weak_key_hash_table (scm_from_int (2047)); + scm_c_define ("source-whash", scm_source_whash); + + scm_last_alist_filename = scm_cons (SCM_EOL, + scm_acons (SCM_EOL, SCM_EOL, SCM_EOL)); + +#include "libguile/srcprop.x" +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/