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* ports.c (scm_c_port_for_each): New function, mostly copied from

Browse source 
scm_port_for_each.
(scm_port_for_each): Reimplemented using scm_c_port_for_each.
* ports.h (scm_c_port_for_each): New prototype.
This commit is contained in:
Marius Vollmer 2003-04-30 14:38:53 +00:00
parent a1a5dfa888
commit c536b4b32e
2 changed files with 19 additions and 12 deletions
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30
libguile/ports.c
View file

@ -724,21 +724,12 @@ SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0,
}
#undef FUNC_NAME
SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0,
(SCM proc),
"Apply @var{proc} to each port in the Guile port table\n"
"in turn. The return value is unspecified. More specifically,\n"
"@var{proc} is applied exactly once to every port that exists\n"
"in the system at the time @var{port-for-each} is invoked.\n"
"Changes to the port table while @var{port-for-each} is running\n"
"have no effect as far as @var{port-for-each} is concerned.")
#define FUNC_NAME s_scm_port_for_each
void
scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data)
{
long i;
SCM ports;
SCM_VALIDATE_PROC (1, proc);
/* Even without pre-emptive multithreading, running arbitrary code
while scanning the port table is unsafe because the port table
can change arbitrarily (from a GC, for example). So we build a
@ -754,14 +745,29 @@ SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0,
while (ports != SCM_EOL)
{
scm_call_1 (proc, SCM_CAR (ports));
proc (data, SCM_CAR (ports));
ports = SCM_CDR (ports);
}
}
SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0,
(SCM proc),
"Apply @var{proc} to each port in the Guile port table\n"
"in turn. The return value is unspecified. More specifically,\n"
"@var{proc} is applied exactly once to every port that exists\n"
"in the system at the time @var{port-for-each} is invoked.\n"
"Changes to the port table while @var{port-for-each} is running\n"
"have no effect as far as @var{port-for-each} is concerned.")
#define FUNC_NAME s_scm_port_for_each
{
SCM_VALIDATE_PROC (1, proc);
scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc);
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
/* Utter miscellany. Gosh, we should clean this up some time. */

1
libguile/ports.h
View file

@ -250,6 +250,7 @@ SCM_API SCM scm_close_input_port (SCM port);
SCM_API SCM scm_close_output_port (SCM port);
SCM_API SCM scm_close_port (SCM port);
SCM_API SCM scm_port_for_each (SCM proc);
SCM_API void scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data);
SCM_API SCM scm_input_port_p (SCM x);
SCM_API SCM scm_output_port_p (SCM x);
SCM_API SCM scm_port_p (SCM x);