/* util.c
*
- * Copyright (c) 1991-2002, Larry Wall
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
#include "perl.h"
#ifndef PERL_MICRO
-#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
-#endif
-
#ifndef SIG_ERR
# define SIG_ERR ((Sighandler_t) -1)
#endif
#define FLUSH
-#ifdef LEAKTEST
-
-long xcount[MAXXCOUNT];
-long lastxcount[MAXXCOUNT];
-long xycount[MAXXCOUNT][MAXYCOUNT];
-long lastxycount[MAXXCOUNT][MAXYCOUNT];
-
-#endif
-
#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
# define FD_CLOEXEC 1 /* NeXT needs this */
#endif
else if (PL_nomemok)
return Nullch;
else {
- PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
+ /* Can't use PerlIO to write as it allocates memory */
+ PerlLIO_write(PerlIO_fileno(Perl_error_log),
+ PL_no_mem, strlen(PL_no_mem));
my_exit(1);
return Nullch;
}
else if (PL_nomemok)
return Nullch;
else {
- PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
+ /* Can't use PerlIO to write as it allocates memory */
+ PerlLIO_write(PerlIO_fileno(Perl_error_log),
+ PL_no_mem, strlen(PL_no_mem));
my_exit(1);
return Nullch;
}
else if (PL_nomemok)
return Nullch;
else {
- PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
+ /* Can't use PerlIO to write as it allocates memory */
+ PerlLIO_write(PerlIO_fileno(Perl_error_log),
+ PL_no_mem, strlen(PL_no_mem));
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
-#ifdef LEAKTEST
-
-struct mem_test_strut {
- union {
- long type;
- char c[2];
- } u;
- long size;
-};
-
-# define ALIGN sizeof(struct mem_test_strut)
-
-# define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size)
-# define typeof_chunk(ch) \
- (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100)
-# define set_typeof_chunk(ch,t) \
- (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100)
-#define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \
- ? MAXYCOUNT - 1 \
- : ( (size) > 40 \
- ? ((size) - 1)/8 + 5 \
- : ((size) - 1)/4))
-
-Malloc_t
-Perl_safexmalloc(I32 x, MEM_SIZE size)
-{
- register char* where = (char*)safemalloc(size + ALIGN);
-
- xcount[x] += size;
- xycount[x][SIZE_TO_Y(size)]++;
- set_typeof_chunk(where, x);
- sizeof_chunk(where) = size;
- return (Malloc_t)(where + ALIGN);
-}
-
-Malloc_t
-Perl_safexrealloc(Malloc_t wh, MEM_SIZE size)
-{
- char *where = (char*)wh;
-
- if (!wh)
- return safexmalloc(0,size);
-
- {
- MEM_SIZE old = sizeof_chunk(where - ALIGN);
- int t = typeof_chunk(where - ALIGN);
- register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN);
-
- xycount[t][SIZE_TO_Y(old)]--;
- xycount[t][SIZE_TO_Y(size)]++;
- xcount[t] += size - old;
- sizeof_chunk(new) = size;
- return (Malloc_t)(new + ALIGN);
- }
-}
-
-void
-Perl_safexfree(Malloc_t wh)
-{
- I32 x;
- char *where = (char*)wh;
- MEM_SIZE size;
-
- if (!where)
- return;
- where -= ALIGN;
- size = sizeof_chunk(where);
- x = where[0] + 100 * where[1];
- xcount[x] -= size;
- xycount[x][SIZE_TO_Y(size)]--;
- safefree(where);
-}
-
-Malloc_t
-Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size)
-{
- register char * where = (char*)safexmalloc(x, size * count + ALIGN);
- xcount[x] += size;
- xycount[x][SIZE_TO_Y(size)]++;
- memset((void*)(where + ALIGN), 0, size * count);
- set_typeof_chunk(where, x);
- sizeof_chunk(where) = size;
- return (Malloc_t)(where + ALIGN);
-}
-
-STATIC void
-S_xstat(pTHX_ int flag)
-{
- register I32 i, j, total = 0;
- I32 subtot[MAXYCOUNT];
-
- for (j = 0; j < MAXYCOUNT; j++) {
- subtot[j] = 0;
- }
-
- PerlIO_printf(Perl_debug_log, " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total);
- for (i = 0; i < MAXXCOUNT; i++) {
- total += xcount[i];
- for (j = 0; j < MAXYCOUNT; j++) {
- subtot[j] += xycount[i][j];
- }
- if (flag == 0
- ? xcount[i] /* Have something */
- : (flag == 2
- ? xcount[i] != lastxcount[i] /* Changed */
- : xcount[i] > lastxcount[i])) { /* Growed */
- PerlIO_printf(Perl_debug_log,"%2d %02d %7ld ", i / 100, i % 100,
- flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]);
- lastxcount[i] = xcount[i];
- for (j = 0; j < MAXYCOUNT; j++) {
- if ( flag == 0
- ? xycount[i][j] /* Have something */
- : (flag == 2
- ? xycount[i][j] != lastxycount[i][j] /* Changed */
- : xycount[i][j] > lastxycount[i][j])) { /* Growed */
- PerlIO_printf(Perl_debug_log,"%3ld ",
- flag == 2
- ? xycount[i][j] - lastxycount[i][j]
- : xycount[i][j]);
- lastxycount[i][j] = xycount[i][j];
- } else {
- PerlIO_printf(Perl_debug_log, " . ", xycount[i][j]);
- }
- }
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (flag != 2) {
- PerlIO_printf(Perl_debug_log, "Total %7ld ", total);
- for (j = 0; j < MAXYCOUNT; j++) {
- if (subtot[j]) {
- PerlIO_printf(Perl_debug_log, "%3ld ", subtot[j]);
- } else {
- PerlIO_printf(Perl_debug_log, " . ");
- }
- }
- PerlIO_printf(Perl_debug_log, "\n");
- }
-}
-
-#endif /* LEAKTEST */
-
/* These must be defined when not using Perl's malloc for binary
* compatibility */
I32 rarest = 0;
U32 frequency = 256;
- if (flags & FBMcf_TAIL)
+ if (flags & FBMcf_TAIL) {
+ MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
+ if (mg && mg->mg_len >= 0)
+ mg->mg_len++;
+ }
s = (U8*)SvPV_force(sv, len);
(void)SvUPGRADE(sv, SVt_PVBM);
if (len == 0) /* TAIL might be on a zero-length string. */
line_mode ? "line" : "chunk",
(IV)IoLINES(GvIOp(PL_last_in_gv)));
}
-#ifdef USE_5005THREADS
- if (thr->tid)
- Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid);
-#endif
sv_catpv(sv, PL_dirty ? dgd : ".\n");
}
return sv;
}
+void
+Perl_write_to_stderr(pTHX_ const char* message, int msglen)
+{
+ IO *io;
+ MAGIC *mg;
+
+ if (PL_stderrgv && SvREFCNT(PL_stderrgv)
+ && (io = GvIO(PL_stderrgv))
+ && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+ {
+ dSP;
+ ENTER;
+ SAVETMPS;
+
+ save_re_context();
+ SAVESPTR(PL_stderrgv);
+ PL_stderrgv = Nullgv;
+
+ PUSHSTACKi(PERLSI_MAGIC);
+
+ PUSHMARK(SP);
+ EXTEND(SP,2);
+ PUSHs(SvTIED_obj((SV*)io, mg));
+ PUSHs(sv_2mortal(newSVpvn(message, msglen)));
+ PUTBACK;
+ call_method("PRINT", G_SCALAR);
+
+ POPSTACK;
+ FREETMPS;
+ LEAVE;
+ }
+ else {
+#ifdef USE_SFIO
+ /* SFIO can really mess with your errno */
+ int e = errno;
+#endif
+ PerlIO *serr = Perl_error_log;
+
+ PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
+ (void)PerlIO_flush(serr);
+#ifdef USE_SFIO
+ errno = e;
+#endif
+ }
+}
+
OP *
Perl_vdie(pTHX_ const char* pat, va_list *args)
{
CV *cv;
SV *msv;
STRLEN msglen;
+ I32 utf8 = 0;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p: die: curstack = %p, mainstack = %p\n",
}
else
message = SvPV(msv,msglen);
+ utf8 = SvUTF8(msv);
}
else {
message = Nullch;
save_re_context();
if (message) {
msg = newSVpvn(message, msglen);
+ SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
}
PL_restartop = die_where(message, msglen);
+ SvFLAGS(ERRSV) |= utf8;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
thr, PL_restartop, was_in_eval, PL_top_env));
CV *cv;
SV *msv;
STRLEN msglen;
+ I32 utf8 = 0;
if (pat) {
msv = vmess(pat, args);
}
else
message = SvPV(msv,msglen);
+ utf8 = SvUTF8(msv);
}
else {
message = Nullch;
save_re_context();
if (message) {
msg = newSVpvn(message, msglen);
+ SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
}
if (PL_in_eval) {
PL_restartop = die_where(message, msglen);
+ SvFLAGS(ERRSV) |= utf8;
JMPENV_JUMP(3);
}
else if (!message)
message = SvPVx(ERRSV, msglen);
- {
-#ifdef USE_SFIO
- /* SFIO can really mess with your errno */
- int e = errno;
-#endif
- PerlIO *serr = Perl_error_log;
-
- PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
- (void)PerlIO_flush(serr);
-#ifdef USE_SFIO
- errno = e;
-#endif
- }
+ write_to_stderr(message, msglen);
my_failure_exit();
}
=for apidoc croak
This is the XSUB-writer's interface to Perl's C<die> function.
-Normally use this function the same way you use the C C<printf>
-function. See C<warn>.
+Normally call this function the same way you call the C C<printf>
+function. Calling C<croak> returns control directly to Perl,
+sidestepping the normal C order of execution. See C<warn>.
If you want to throw an exception object, assign the object to
C<$@> and then pass C<Nullch> to croak():
CV *cv;
SV *msv;
STRLEN msglen;
- IO *io;
- MAGIC *mg;
+ I32 utf8 = 0;
msv = vmess(pat, args);
+ utf8 = SvUTF8(msv);
message = SvPV(msv, msglen);
if (PL_warnhook) {
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
+ SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
}
- /* if STDERR is tied, use it instead */
- if (PL_stderrgv && (io = GvIOp(PL_stderrgv))
- && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
- dSP; ENTER;
- PUSHMARK(SP);
- XPUSHs(SvTIED_obj((SV*)io, mg));
- XPUSHs(sv_2mortal(newSVpvn(message, msglen)));
- PUTBACK;
- call_method("PRINT", G_SCALAR);
- LEAVE;
- return;
- }
-
- {
- PerlIO *serr = Perl_error_log;
-
- PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
-#ifdef LEAKTEST
- DEBUG_L(*message == '!'
- ? (xstat(message[1]=='!'
- ? (message[2]=='!' ? 2 : 1)
- : 0)
- , 0)
- : 0);
-#endif
- (void)PerlIO_flush(serr);
- }
+ write_to_stderr(message, msglen);
}
#if defined(PERL_IMPLICIT_CONTEXT)
/*
=for apidoc warn
-This is the XSUB-writer's interface to Perl's C<warn> function. Use this
-function the same way you use the C C<printf> function. See
-C<croak>.
+This is the XSUB-writer's interface to Perl's C<warn> function. Call this
+function the same way you call the C C<printf> function. See C<croak>.
=cut
*/
CV *cv;
SV *msv;
STRLEN msglen;
+ I32 utf8 = 0;
msv = vmess(pat, args);
message = SvPV(msv, msglen);
+ utf8 = SvUTF8(msv);
if (ckDEAD(err)) {
-#ifdef USE_5005THREADS
- DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message));
-#endif /* USE_5005THREADS */
if (PL_diehook) {
/* sv_2cv might call Perl_croak() */
SV *olddiehook = PL_diehook;
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
+ SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
if (PL_in_eval) {
PL_restartop = die_where(message, msglen);
+ SvFLAGS(ERRSV) |= utf8;
JMPENV_JUMP(3);
}
- {
- PerlIO *serr = Perl_error_log;
- PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
- (void)PerlIO_flush(serr);
- }
+ write_to_stderr(message, msglen);
my_failure_exit();
}
else {
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
+ SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
return;
}
}
- {
- PerlIO *serr = Perl_error_log;
- PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
-#ifdef LEAKTEST
- DEBUG_L(*message == '!'
- ? (xstat(message[1]=='!'
- ? (message[2]=='!' ? 2 : 1)
- : 0)
- , 0)
- : 0);
-#endif
- (void)PerlIO_flush(serr);
- }
+ write_to_stderr(message, msglen);
}
}
#endif /* WIN32 || NETWARE */
+#ifndef PERL_MICRO
I32
Perl_setenv_getix(pTHX_ char *nam)
{
} /* potential SEGV's */
return i;
}
+#endif /* !PERL_MICRO */
#endif /* !VMS && !EPOC*/
void
Perl_atfork_lock(void)
{
-#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
+#if defined(USE_ITHREADS)
/* locks must be held in locking order (if any) */
# ifdef MYMALLOC
MUTEX_LOCK(&PL_malloc_mutex);
void
Perl_atfork_unlock(void)
{
-#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
+#if defined(USE_ITHREADS)
/* locks must be released in same order as in atfork_lock() */
# ifdef MYMALLOC
MUTEX_UNLOCK(&PL_malloc_mutex);
{
#if defined(HAS_FORK)
Pid_t pid;
-#if (defined(USE_5005THREADS) || defined(USE_ITHREADS)) && !defined(HAS_PTHREAD_ATFORK)
+#if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK)
atfork_lock();
pid = fork();
atfork_unlock();
#ifndef PERL_MICRO
#ifdef HAS_SIGACTION
+#ifdef MACOS_TRADITIONAL
+/* We don't want restart behavior on MacOS */
+#undef SA_RESTART
+#endif
+
Sighandler_t
Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
{
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
-#if defined(PERL_OLD_SIGNALS)
- act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
+ if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
+ act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
-#endif
-#ifdef SA_NOCLDWAIT
+#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
-#if defined(PERL_OLD_SIGNALS)
- act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
-#endif
+ if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
+ act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
-#ifdef SA_NOCLDWAIT
+#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
void *
Perl_get_context(void)
{
-#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
+#if defined(USE_ITHREADS)
# ifdef OLD_PTHREADS_API
pthread_addr_t t;
if (pthread_getspecific(PL_thr_key, &t))
void
Perl_set_context(void *t)
{
-#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
+#if defined(USE_ITHREADS)
# ifdef I_MACH_CTHREADS
cthread_set_data(cthread_self(), t);
# else
#endif /* !PERL_GET_CONTEXT_DEFINED */
-#ifdef USE_5005THREADS
-
-#ifdef FAKE_THREADS
-/* Very simplistic scheduler for now */
-void
-schedule(void)
-{
- thr = thr->i.next_run;
-}
-
-void
-Perl_cond_init(pTHX_ perl_cond *cp)
-{
- *cp = 0;
-}
-
-void
-Perl_cond_signal(pTHX_ perl_cond *cp)
-{
- perl_os_thread t;
- perl_cond cond = *cp;
-
- if (!cond)
- return;
- t = cond->thread;
- /* Insert t in the runnable queue just ahead of us */
- t->i.next_run = thr->i.next_run;
- thr->i.next_run->i.prev_run = t;
- t->i.prev_run = thr;
- thr->i.next_run = t;
- thr->i.wait_queue = 0;
- /* Remove from the wait queue */
- *cp = cond->next;
- Safefree(cond);
-}
-
-void
-Perl_cond_broadcast(pTHX_ perl_cond *cp)
-{
- perl_os_thread t;
- perl_cond cond, cond_next;
-
- for (cond = *cp; cond; cond = cond_next) {
- t = cond->thread;
- /* Insert t in the runnable queue just ahead of us */
- t->i.next_run = thr->i.next_run;
- thr->i.next_run->i.prev_run = t;
- t->i.prev_run = thr;
- thr->i.next_run = t;
- thr->i.wait_queue = 0;
- /* Remove from the wait queue */
- cond_next = cond->next;
- Safefree(cond);
- }
- *cp = 0;
-}
-
-void
-Perl_cond_wait(pTHX_ perl_cond *cp)
-{
- perl_cond cond;
-
- if (thr->i.next_run == thr)
- Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
-
- New(666, cond, 1, struct perl_wait_queue);
- cond->thread = thr;
- cond->next = *cp;
- *cp = cond;
- thr->i.wait_queue = cond;
- /* Remove ourselves from runnable queue */
- thr->i.next_run->i.prev_run = thr->i.prev_run;
- thr->i.prev_run->i.next_run = thr->i.next_run;
-}
-#endif /* FAKE_THREADS */
-
-MAGIC *
-Perl_condpair_magic(pTHX_ SV *sv)
-{
- MAGIC *mg;
-
- (void)SvUPGRADE(sv, SVt_PVMG);
- mg = mg_find(sv, PERL_MAGIC_mutex);
- if (!mg) {
- condpair_t *cp;
-
- New(53, cp, 1, condpair_t);
- MUTEX_INIT(&cp->mutex);
- COND_INIT(&cp->owner_cond);
- COND_INIT(&cp->cond);
- cp->owner = 0;
- LOCK_CRED_MUTEX; /* XXX need separate mutex? */
- mg = mg_find(sv, PERL_MAGIC_mutex);
- if (mg) {
- /* someone else beat us to initialising it */
- UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
- MUTEX_DESTROY(&cp->mutex);
- COND_DESTROY(&cp->owner_cond);
- COND_DESTROY(&cp->cond);
- Safefree(cp);
- }
- else {
- sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0);
- mg = SvMAGIC(sv);
- mg->mg_ptr = (char *)cp;
- mg->mg_len = sizeof(cp);
- UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
- DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log,
- "%p: condpair_magic %p\n", thr, sv)));
- }
- }
- return mg;
-}
-
-SV *
-Perl_sv_lock(pTHX_ SV *osv)
-{
- MAGIC *mg;
- SV *sv = osv;
-
- LOCK_SV_LOCK_MUTEX;
- if (SvROK(sv)) {
- sv = SvRV(sv);
- }
-
- mg = condpair_magic(sv);
- MUTEX_LOCK(MgMUTEXP(mg));
- if (MgOWNER(mg) == thr)
- MUTEX_UNLOCK(MgMUTEXP(mg));
- else {
- while (MgOWNER(mg))
- COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
- MgOWNER(mg) = thr;
- DEBUG_S(PerlIO_printf(Perl_debug_log,
- "0x%"UVxf": Perl_lock lock 0x%"UVxf"\n",
- PTR2UV(thr), PTR2UV(sv)));
- MUTEX_UNLOCK(MgMUTEXP(mg));
- SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
- }
- UNLOCK_SV_LOCK_MUTEX;
- return sv;
-}
-
-/*
- * Make a new perl thread structure using t as a prototype. Some of the
- * fields for the new thread are copied from the prototype thread, t,
- * so t should not be running in perl at the time this function is
- * called. The use by ext/Thread/Thread.xs in core perl (where t is the
- * thread calling new_struct_thread) clearly satisfies this constraint.
- */
-struct perl_thread *
-Perl_new_struct_thread(pTHX_ struct perl_thread *t)
-{
-#if !defined(PERL_IMPLICIT_CONTEXT)
- struct perl_thread *thr;
-#endif
- SV *sv;
- SV **svp;
- I32 i;
-
- sv = newSVpvn("", 0);
- SvGROW(sv, sizeof(struct perl_thread) + 1);
- SvCUR_set(sv, sizeof(struct perl_thread));
- thr = (Thread) SvPVX(sv);
-#ifdef DEBUGGING
- Poison(thr, 1, struct perl_thread);
- PL_markstack = 0;
- PL_scopestack = 0;
- PL_savestack = 0;
- PL_retstack = 0;
- PL_dirty = 0;
- PL_localizing = 0;
- Zero(&PL_hv_fetch_ent_mh, 1, HE);
- PL_efloatbuf = (char*)NULL;
- PL_efloatsize = 0;
-#else
- Zero(thr, 1, struct perl_thread);
-#endif
-
- thr->oursv = sv;
- init_stacks();
-
- PL_curcop = &PL_compiling;
- thr->interp = t->interp;
- thr->cvcache = newHV();
- thr->threadsv = newAV();
- thr->specific = newAV();
- thr->errsv = newSVpvn("", 0);
- thr->flags = THRf_R_JOINABLE;
- thr->thr_done = 0;
- MUTEX_INIT(&thr->mutex);
-
- JMPENV_BOOTSTRAP;
-
- PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */
- PL_restartop = 0;
-
- PL_statname = NEWSV(66,0);
- PL_errors = newSVpvn("", 0);
- PL_maxscream = -1;
- PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
- PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
- PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
- PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
- PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
- PL_regindent = 0;
- PL_reginterp_cnt = 0;
- PL_lastscream = Nullsv;
- PL_screamfirst = 0;
- PL_screamnext = 0;
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_poscache = Nullch;
-
- PL_peepp = MEMBER_TO_FPTR(Perl_peep);
-
- /* parent thread's data needs to be locked while we make copy */
- MUTEX_LOCK(&t->mutex);
-
-#ifdef PERL_FLEXIBLE_EXCEPTIONS
- PL_protect = t->Tprotect;
-#endif
-
- PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
- PL_defstash = t->Tdefstash; /* XXX maybe these should */
- PL_curstash = t->Tcurstash; /* always be set to main? */
-
- PL_tainted = t->Ttainted;
- PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
- PL_rs = newSVsv(t->Trs);
- PL_last_in_gv = Nullgv;
- PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv;
- PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
- PL_chopset = t->Tchopset;
- PL_bodytarget = newSVsv(t->Tbodytarget);
- PL_toptarget = newSVsv(t->Ttoptarget);
- if (t->Tformtarget == t->Ttoptarget)
- PL_formtarget = PL_toptarget;
- else
- PL_formtarget = PL_bodytarget;
-
- /* Initialise all per-thread SVs that the template thread used */
- svp = AvARRAY(t->threadsv);
- for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
- if (*svp && *svp != &PL_sv_undef) {
- SV *sv = newSVsv(*svp);
- av_store(thr->threadsv, i, sv);
- sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1);
- DEBUG_S(PerlIO_printf(Perl_debug_log,
- "new_struct_thread: copied threadsv %"IVdf" %p->%p\n",
- (IV)i, t, thr));
- }
- }
- thr->threadsvp = AvARRAY(thr->threadsv);
-
- MUTEX_LOCK(&PL_threads_mutex);
- PL_nthreads++;
- thr->tid = ++PL_threadnum;
- thr->next = t->next;
- thr->prev = t;
- t->next = thr;
- thr->next->prev = thr;
- MUTEX_UNLOCK(&PL_threads_mutex);
-
- /* done copying parent's state */
- MUTEX_UNLOCK(&t->mutex);
-
-#ifdef HAVE_THREAD_INTERN
- Perl_init_thread_intern(thr);
-#endif /* HAVE_THREAD_INTERN */
- return thr;
-}
-#endif /* USE_5005THREADS */
-
#ifdef PERL_GLOBAL_STRUCT
struct perl_vars *
Perl_GetVars(pTHX)
case want_vtbl_uvar:
result = &PL_vtbl_uvar;
break;
-#ifdef USE_5005THREADS
- case want_vtbl_mutex:
- result = &PL_vtbl_mutex;
- break;
-#endif
case want_vtbl_defelem:
result = &PL_vtbl_defelem;
break;
case want_vtbl_backref:
result = &PL_vtbl_backref;
break;
+ case want_vtbl_utf8:
+ result = &PL_vtbl_utf8;
+ break;
}
return result;
}
I32
Perl_my_fflush_all(pTHX)
{
-#if defined(FFLUSH_NULL)
+#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
return PerlIO_flush(NULL);
#else
# if defined(HAS__FWALK)
return 0;
}
# endif
- SETERRNO(EBADF,RMS$_IFI);
+ SETERRNO(EBADF,RMS_IFI);
return EOF;
# endif
#endif
mytm.tm_yday = yday;
mytm.tm_isdst = isdst;
mini_mktime(&mytm);
+ /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
+#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
+ STMT_START {
+ struct tm mytm2;
+ mytm2 = mytm;
+ mktime(&mytm2);
+#ifdef HAS_TM_TM_GMTOFF
+ mytm.tm_gmtoff = mytm2.tm_gmtoff;
+#endif
+#ifdef HAS_TM_TM_ZONE
+ mytm.tm_zone = mytm2.tm_zone;
+#endif
+ } STMT_END;
+#endif
buflen = 64;
New(0, buf, buflen, char);
len = strftime(buf, buflen, fmt, &mytm);
}
/*
-=head1 SV Manipulation Functions
-
-=for apidoc scan_vstring
+=for apidoc scan_version
Returns a pointer to the next character after the parsed
-vstring, as well as updating the passed in sv.
+version string, as well as upgrading the passed in SV to
+an RV.
-Function must be called like
+Function must be called with an already existing SV like
- sv = NEWSV(92,5);
- s = scan_vstring(s,sv);
+ sv = newSV(0);
+ s = scan_version(s,SV *sv, bool qv);
-The sv should already be large enough to store the vstring
-passed in, for performance reasons.
+Performs some preprocessing to the string to ensure that
+it has the correct characteristics of a version. Flags the
+object if it contains an underscore (which denotes this
+is a alpha version). The boolean qv denotes that the version
+should be interpreted as if it had multiple decimals, even if
+it doesn't.
=cut
*/
char *
-Perl_scan_vstring(pTHX_ char *s, SV *sv)
+Perl_scan_version(pTHX_ char *s, SV *rv, bool qv)
{
+ const char *start = s;
char *pos = s;
- char *start = s;
- if (*pos == 'v') pos++; /* get past 'v' */
- while (isDIGIT(*pos) || *pos == '_')
- pos++;
+ I32 saw_period = 0;
+ bool saw_under = 0;
+ SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
+ (void)sv_upgrade(sv, SVt_PVAV); /* needs to be an AV type */
+
+ /* pre-scan the imput string to check for decimals */
+ while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) )
+ {
+ if ( *pos == '.' )
+ {
+ if ( saw_under )
+ Perl_croak(aTHX_ "Invalid version format (underscores before decimal)");
+ saw_period++ ;
+ }
+ else if ( *pos == '_' )
+ {
+ if ( saw_under )
+ Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
+ saw_under = 1;
+ }
+ pos++;
+ }
+ pos = s;
+
+ if (*pos == 'v') {
+ pos++; /* get past 'v' */
+ qv = 1; /* force quoted version processing */
+ }
+ while (isDIGIT(*pos))
+ pos++;
if (!isALPHA(*pos)) {
- UV rev;
- U8 tmpbuf[UTF8_MAXLEN+1];
- U8 *tmpend;
+ I32 rev;
if (*s == 'v') s++; /* get past 'v' */
- sv_setpvn(sv, "", 0);
-
for (;;) {
rev = 0;
{
- /* this is atoi() that tolerates underscores */
- char *end = pos;
- UV mult = 1;
- while (--end >= s) {
- UV orev;
- if (*end == '_')
- continue;
- orev = rev;
- rev += (*end - '0') * mult;
- mult *= 10;
- if (orev > rev && ckWARN_d(WARN_OVERFLOW))
- Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
- "Integer overflow in decimal number");
- }
- }
-#ifdef EBCDIC
- if (rev > 0x7FFFFFFF)
- Perl_croak(aTHX "In EBCDIC the v-string components cannot exceed 2147483647");
-#endif
- /* Append native character for the rev point */
- tmpend = uvchr_to_utf8(tmpbuf, rev);
- sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
- if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
- SvUTF8_on(sv);
- if (*pos == '.' && isDIGIT(pos[1]))
- s = ++pos;
+ /* this is atoi() that delimits on underscores */
+ char *end = pos;
+ I32 mult = 1;
+ I32 orev;
+ if ( s < pos && s > start && *(s-1) == '_' ) {
+ mult *= -1; /* alpha version */
+ }
+ /* the following if() will only be true after the decimal
+ * point of a version originally created with a bare
+ * floating point number, i.e. not quoted in any way
+ */
+ if ( !qv && s > start+1 && saw_period == 1 && !saw_under ) {
+ mult = 100;
+ while ( s < end ) {
+ orev = rev;
+ rev += (*s - '0') * mult;
+ mult /= 10;
+ if ( PERL_ABS(orev) > PERL_ABS(rev) )
+ Perl_croak(aTHX_ "Integer overflow in version");
+ s++;
+ }
+ }
+ else {
+ while (--end >= s) {
+ orev = rev;
+ rev += (*end - '0') * mult;
+ mult *= 10;
+ if ( PERL_ABS(orev) > PERL_ABS(rev) )
+ Perl_croak(aTHX_ "Integer overflow in version");
+ }
+ }
+ }
+
+ /* Append revision */
+ av_push((AV *)sv, newSViv(rev));
+ if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1]))
+ s = ++pos;
+ else if ( isDIGIT(*pos) )
+ s = pos;
else {
- s = pos;
- break;
- }
- while (isDIGIT(*pos) || *pos == '_')
- pos++;
- }
- SvPOK_on(sv);
- sv_magicext(sv,NULL,PERL_MAGIC_vstring,NULL,(const char*)start, pos-start);
- SvRMAGICAL_on(sv);
- }
- return s;
-}
-
-
-/*
-=for apidoc scan_version
-
-Returns a pointer to the next character after the parsed
-version string, as well as upgrading the passed in SV to
-an RV.
-
-Function must be called with an already existing SV like
-
- sv = NEWSV(92,0);
- s = scan_version(s,sv);
-
-Performs some preprocessing to the string to ensure that
-it has the correct characteristics of a version. Flags the
-object if it contains an underscore (which denotes this
-is a beta version).
-
-=cut
-*/
-
-char *
-Perl_scan_version(pTHX_ char *version, SV *rv)
-{
- char* d;
- int beta = 0;
- SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
- d = version;
- if (*d == 'v')
- d++;
- if (isDIGIT(*d)) {
- while (isDIGIT(*d) || *d == '.' || *d == '\0')
- d++;
- if (*d == '_') {
- *d = '.';
- if (*(d+1) == '0' && *(d+2) != '0') { /* perl-style version */
- *(d+1) = *(d+2);
- *(d+2) = '0';
- if (ckWARN(WARN_PORTABLE))
- Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
- "perl-style version not portable");
+ s = pos;
+ break;
}
- else {
- beta = -1;
+ while ( isDIGIT(*pos) ) {
+ if ( !saw_under && saw_period == 1 && pos-s == 3 )
+ break;
+ pos++;
}
}
- while (isDIGIT(*d) || *d == '.' || *d == '\0')
- d++;
- if (*d == '_')
- Perl_croak(aTHX_ "Invalid version format (multiple underscores)");
}
- version = scan_vstring(version, sv); /* store the v-string in the object */
- SvIVX(sv) = beta;
- return version;
+ return s;
}
/*
SV *
Perl_new_version(pTHX_ SV *ver)
{
- SV *rv = NEWSV(92,5);
- char *version;
-
- if ( SvMAGICAL(ver) ) { /* already a v-string */
+ SV *rv = newSV(0);
+#ifdef SvVOK
+ if ( SvVOK(ver) ) { /* already a v-string */
+ char *version;
MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
+ sv_setpv(rv,version);
+ Safefree(version);
}
else {
- version = (char *)SvPV_nolen(ver);
+#endif
+ sv_setsv(rv,ver); /* make a duplicate */
+#ifdef SvVOK
}
- version = scan_version(version,rv);
+#endif
+ upg_version(rv);
return rv;
}
*/
SV *
-Perl_upg_version(pTHX_ SV *sv)
+Perl_upg_version(pTHX_ SV *ver)
{
- char *version = (char *)SvPV_nolen(sv_mortalcopy(sv));
- bool utf8 = SvUTF8(sv);
- if ( SvVOK(sv) ) { /* already a v-string */
- SV * ver = newSVrv(sv, "version");
- sv_setpv(ver,version);
- if ( utf8 )
- SvUTF8_on(ver);
+ char *version;
+ bool qv = 0;
+
+ if ( SvNOK(ver) ) /* may get too much accuracy */
+ {
+ char tbuf[64];
+ sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
+ version = savepv(tbuf);
}
- else {
- version = scan_version(version,sv);
+#ifdef SvVOK
+ else if ( SvVOK(ver) ) { /* already a v-string */
+ MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring);
+ version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
+ qv = 1;
}
- return sv;
+#endif
+ else /* must be a string or something like a string */
+ {
+ STRLEN n_a;
+ version = savepv(SvPV(ver,n_a));
+ }
+ (void)scan_version(version, ver, qv);
+ Safefree(version);
+ return ver;
}
/*
=for apidoc vnumify
-Accepts a version (or vstring) object and returns the
-normalized floating point representation. Call like:
+Accepts a version object and returns the normalized floating
+point representation. Call like:
- sv = vnumify(sv,SvRV(rv));
+ sv = vnumify(rv);
-NOTE: no checking is done to see if the object is of the
-correct type (for speed).
+NOTE: you can pass either the object directly or the SV
+contained within the RV.
=cut
*/
SV *
-Perl_vnumify(pTHX_ SV *sv, SV *vs)
+Perl_vnumify(pTHX_ SV *vs)
{
- U8* pv = (U8*)SvPVX(vs);
- STRLEN len = SvCUR(vs);
- STRLEN retlen;
- UV digit = utf8_to_uvchr(pv,&retlen);
- Perl_sv_setpvf(aTHX_ sv,"%"UVf".",digit);
- for (pv += retlen, len -= retlen;
- len > 0;
- pv += retlen, len -= retlen)
+ I32 i, len, digit;
+ SV *sv = newSV(0);
+ if ( SvROK(vs) )
+ vs = SvRV(vs);
+ len = av_len((AV *)vs);
+ if ( len == -1 )
+ {
+ Perl_sv_catpv(aTHX_ sv,"0");
+ return sv;
+ }
+ digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
+ Perl_sv_setpvf(aTHX_ sv,"%d.", PERL_ABS(digit));
+ for ( i = 1 ; i <= len ; i++ )
{
- digit = utf8_to_uvchr(pv,&retlen);
- Perl_sv_catpvf(aTHX_ sv,"%03"UVf,digit);
+ digit = SvIVX(*av_fetch((AV *)vs, i, 0));
+ Perl_sv_catpvf(aTHX_ sv,"%03d", PERL_ABS(digit));
}
+ if ( len == 0 )
+ Perl_sv_catpv(aTHX_ sv,"000");
+ sv_setnv(sv, SvNV(sv));
return sv;
}
/*
=for apidoc vstringify
-Accepts a version (or vstring) object and returns the
-normalized representation. Call like:
+Accepts a version object and returns the normalized string
+representation. Call like:
- sv = vstringify(sv,SvRV(rv));
+ sv = vstringify(rv);
-NOTE: no checking is done to see if the object is of the
-correct type (for speed).
+NOTE: you can pass either the object directly or the SV
+contained within the RV.
=cut
*/
SV *
-Perl_vstringify(pTHX_ SV *sv, SV *vs)
+Perl_vstringify(pTHX_ SV *vs)
{
- U8* pv = (U8*)SvPVX(vs);
- STRLEN len = SvCUR(vs);
- STRLEN retlen;
- UV digit = utf8_to_uvchr(pv,&retlen);
- Perl_sv_setpvf(aTHX_ sv,"%"UVf,digit);
- for (pv += retlen, len -= retlen;
- len > 0;
- pv += retlen, len -= retlen)
+ I32 i, len, digit;
+ SV *sv = newSV(0);
+ if ( SvROK(vs) )
+ vs = SvRV(vs);
+ len = av_len((AV *)vs);
+ if ( len == -1 )
{
- digit = utf8_to_uvchr(pv,&retlen);
- Perl_sv_catpvf(aTHX_ sv,".%"UVf,digit);
+ Perl_sv_catpv(aTHX_ sv,"");
+ return sv;
}
- if (SvIVX(vs) < 0) {
- char* pv = SvPVX(sv);
- for (pv += SvCUR(sv); *pv != '.'; pv--)
- ;
- *pv = '_';
+ digit = SvIVX(*av_fetch((AV *)vs, 0, 0));
+ Perl_sv_setpvf(aTHX_ sv,"%"IVdf,(IV)digit);
+ for ( i = 1 ; i <= len ; i++ )
+ {
+ digit = SvIVX(*av_fetch((AV *)vs, i, 0));
+ if ( digit < 0 )
+ Perl_sv_catpvf(aTHX_ sv,"_%"IVdf,(IV)-digit);
+ else
+ Perl_sv_catpvf(aTHX_ sv,".%"IVdf,(IV)digit);
}
+
+ if ( len <= 2 ) { /* short version, must be at least three */
+ for ( len = 2 - len; len != 0; len-- )
+ Perl_sv_catpv(aTHX_ sv,".0");
+ }
+
return sv;
+}
+
+/*
+=for apidoc vcmp
+
+Version object aware cmp. Both operands must already have been
+converted into version objects.
+
+=cut
+*/
+
+int
+Perl_vcmp(pTHX_ SV *lsv, SV *rsv)
+{
+ I32 i,l,m,r,retval;
+ if ( SvROK(lsv) )
+ lsv = SvRV(lsv);
+ if ( SvROK(rsv) )
+ rsv = SvRV(rsv);
+ l = av_len((AV *)lsv);
+ r = av_len((AV *)rsv);
+ m = l < r ? l : r;
+ retval = 0;
+ i = 0;
+ while ( i <= m && retval == 0 )
+ {
+ I32 left = SvIV(*av_fetch((AV *)lsv,i,0));
+ I32 right = SvIV(*av_fetch((AV *)rsv,i,0));
+ bool lalpha = left < 0 ? 1 : 0;
+ bool ralpha = right < 0 ? 1 : 0;
+ left = abs(left);
+ right = abs(right);
+ if ( left < right || (left == right && lalpha && !ralpha) )
+ retval = -1;
+ if ( left > right || (left == right && ralpha && !lalpha) )
+ retval = +1;
+ i++;
+ }
+
+ if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
+ {
+ if ( l < r )
+ {
+ while ( i <= r && retval == 0 )
+ {
+ if ( SvIV(*av_fetch((AV *)rsv,i,0)) != 0 )
+ retval = -1; /* not a match after all */
+ i++;
+ }
+ }
+ else
+ {
+ while ( i <= l && retval == 0 )
+ {
+ if ( SvIV(*av_fetch((AV *)lsv,i,0)) != 0 )
+ retval = +1; /* not a match after all */
+ i++;
+ }
+ }
+ }
+ return retval;
}
#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
{
}
+U32
+Perl_parse_unicode_opts(pTHX_ char **popt)
+{
+ char *p = *popt;
+ U32 opt = 0;
+
+ if (*p) {
+ if (isDIGIT(*p)) {
+ opt = (U32) atoi(p);
+ while (isDIGIT(*p)) p++;
+ if (*p && *p != '\n' && *p != '\r')
+ Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
+ }
+ else {
+ for (; *p; p++) {
+ switch (*p) {
+ case PERL_UNICODE_STDIN:
+ opt |= PERL_UNICODE_STDIN_FLAG; break;
+ case PERL_UNICODE_STDOUT:
+ opt |= PERL_UNICODE_STDOUT_FLAG; break;
+ case PERL_UNICODE_STDERR:
+ opt |= PERL_UNICODE_STDERR_FLAG; break;
+ case PERL_UNICODE_STD:
+ opt |= PERL_UNICODE_STD_FLAG; break;
+ case PERL_UNICODE_IN:
+ opt |= PERL_UNICODE_IN_FLAG; break;
+ case PERL_UNICODE_OUT:
+ opt |= PERL_UNICODE_OUT_FLAG; break;
+ case PERL_UNICODE_INOUT:
+ opt |= PERL_UNICODE_INOUT_FLAG; break;
+ case PERL_UNICODE_LOCALE:
+ opt |= PERL_UNICODE_LOCALE_FLAG; break;
+ case PERL_UNICODE_ARGV:
+ opt |= PERL_UNICODE_ARGV_FLAG; break;
+ default:
+ if (*p != '\n' && *p != '\r')
+ Perl_croak(aTHX_
+ "Unknown Unicode option letter '%c'", *p);
+ }
+ }
+ }
+ }
+ else
+ opt = PERL_UNICODE_DEFAULT_FLAGS;
+
+ if (opt & ~PERL_UNICODE_ALL_FLAGS)
+ Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
+ (UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
+
+ *popt = p;
+
+ return opt;
+}
+
+U32
+Perl_seed(pTHX)
+{
+ /*
+ * This is really just a quick hack which grabs various garbage
+ * values. It really should be a real hash algorithm which
+ * spreads the effect of every input bit onto every output bit,
+ * if someone who knows about such things would bother to write it.
+ * Might be a good idea to add that function to CORE as well.
+ * No numbers below come from careful analysis or anything here,
+ * except they are primes and SEED_C1 > 1E6 to get a full-width
+ * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
+ * probably be bigger too.
+ */
+#if RANDBITS > 16
+# define SEED_C1 1000003
+#define SEED_C4 73819
+#else
+# define SEED_C1 25747
+#define SEED_C4 20639
+#endif
+#define SEED_C2 3
+#define SEED_C3 269
+#define SEED_C5 26107
+
+#ifndef PERL_NO_DEV_RANDOM
+ int fd;
+#endif
+ U32 u;
+#ifdef VMS
+# include <starlet.h>
+ /* when[] = (low 32 bits, high 32 bits) of time since epoch
+ * in 100-ns units, typically incremented ever 10 ms. */
+ unsigned int when[2];
+#else
+# ifdef HAS_GETTIMEOFDAY
+ struct timeval when;
+# else
+ Time_t when;
+# endif
+#endif
+
+/* This test is an escape hatch, this symbol isn't set by Configure. */
+#ifndef PERL_NO_DEV_RANDOM
+#ifndef PERL_RANDOM_DEVICE
+ /* /dev/random isn't used by default because reads from it will block
+ * if there isn't enough entropy available. You can compile with
+ * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
+ * is enough real entropy to fill the seed. */
+# define PERL_RANDOM_DEVICE "/dev/urandom"
+#endif
+ fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
+ if (fd != -1) {
+ if (PerlLIO_read(fd, &u, sizeof u) != sizeof u)
+ u = 0;
+ PerlLIO_close(fd);
+ if (u)
+ return u;
+ }
+#endif
+
+#ifdef VMS
+ _ckvmssts(sys$gettim(when));
+ u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
+#else
+# ifdef HAS_GETTIMEOFDAY
+ PerlProc_gettimeofday(&when,NULL);
+ u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
+# else
+ (void)time(&when);
+ u = (U32)SEED_C1 * when;
+# endif
+#endif
+ u += SEED_C3 * (U32)PerlProc_getpid();
+ u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
+#ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
+ u += SEED_C5 * (U32)PTR2UV(&when);
+#endif
+ return u;
+}
+
+UV
+Perl_get_hash_seed(pTHX)
+{
+ char *s = PerlEnv_getenv("PERL_HASH_SEED");
+ UV myseed = 0;
+
+ if (s)
+ while (isSPACE(*s)) s++;
+ if (s && isDIGIT(*s))
+ myseed = (UV)Atoul(s);
+ else
+#ifdef USE_HASH_SEED_EXPLICIT
+ if (s)
+#endif
+ {
+ /* Compute a random seed */
+ (void)seedDrand01((Rand_seed_t)seed());
+ myseed = (UV)(Drand01() * (NV)UV_MAX);
+#if RANDBITS < (UVSIZE * 8)
+ /* Since there are not enough randbits to to reach all
+ * the bits of a UV, the low bits might need extra
+ * help. Sum in another random number that will
+ * fill in the low bits. */
+ myseed +=
+ (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
+#endif /* RANDBITS < (UVSIZE * 8) */
+ if (myseed == 0) { /* Superparanoia. */
+ myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
+ if (myseed == 0)
+ Perl_croak(aTHX_ "Your random numbers are not that random");
+ }
+ }
+ PL_rehash_seed_set = TRUE;
+
+ return myseed;
+}