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pod/perlpod: Add advice about Z<> uses
[perl5.git] / perl.h
diff --git a/perl.h b/perl.h
index 43b42a8..06f62b1 100644 (file)
--- a/perl.h
+++ b/perl.h
 #define CLANG_DIAG_IGNORE_STMT(x) CLANG_DIAG_IGNORE(x) NOOP
 #define CLANG_DIAG_RESTORE_STMT CLANG_DIAG_RESTORE NOOP
 
+#if defined(_MSC_VER) && (_MSC_VER >= 1300)
+#  define MSVC_DIAG_IGNORE(x) __pragma(warning(push)) \
+                              __pragma(warning(disable : x))
+#  define MSVC_DIAG_RESTORE   __pragma(warning(pop))
+#else
+#  define MSVC_DIAG_IGNORE(x)
+#  define MSVC_DIAG_RESTORE
+#endif
+#define MSVC_DIAG_IGNORE_DECL(x) MSVC_DIAG_IGNORE(x) dNOOP
+#define MSVC_DIAG_RESTORE_DECL MSVC_DIAG_RESTORE dNOOP
+#define MSVC_DIAG_IGNORE_STMT(x) MSVC_DIAG_IGNORE(x) NOOP
+#define MSVC_DIAG_RESTORE_STMT MSVC_DIAG_RESTORE NOOP
+
 #define NOOP /*EMPTY*/(void)0
 #define dNOOP struct Perl___notused_struct
 
 #   define TAINT_WARN_get       0
 #   define TAINT_WARN_set(s)    NOOP
 #else
+    /* Set to tainted if we are running under tainting mode */
 #   define TAINT               (PL_tainted = PL_tainting)
-#   define TAINT_NOT   (PL_tainted = FALSE)
-#   define TAINT_IF(c) if (UNLIKELY(c)) { PL_tainted = PL_tainting; }
+
+#   define TAINT_NOT   (PL_tainted = FALSE)        /* Untaint */
+#   define TAINT_IF(c) if (UNLIKELY(c)) { TAINT; } /* Conditionally taint */
 #   define TAINT_ENV() if (UNLIKELY(PL_tainting)) { taint_env(); }
-#   define TAINT_PROPER(s)     if (UNLIKELY(PL_tainting)) { taint_proper(NULL, s); }
+                                /* croak or warn if tainting */
+#   define TAINT_PROPER(s)     if (UNLIKELY(PL_tainting)) {                \
+                                    taint_proper(NULL, s);                  \
+                                }
 #   define TAINT_set(s)                (PL_tainted = (s))
 #   define TAINT_get           (PL_tainted)
-#   define TAINTING_get                (PL_tainting)
+#   define TAINTING_get                (PL_tainting)   /* Is taint checking enabled? */
 #   define TAINTING_set(s)     (PL_tainting = (s))
-#   define TAINT_WARN_get       (PL_taint_warn)
+#   define TAINT_WARN_get       (PL_taint_warn) /* FALSE => tainting violations
+                                                            are fatal
+                                                   TRUE =>  they're just
+                                                            warnings */
 #   define TAINT_WARN_set(s)    (PL_taint_warn = (s))
 #endif
 
 #   include <xlocale.h>
 #endif
 
-#if !defined(NO_LOCALE) && defined(HAS_SETLOCALE)
-#   define USE_LOCALE
+/* If not forbidden, we enable locale handling if either 1) the POSIX 2008
+ * functions are available, or 2) just the setlocale() function.  This logic is
+ * repeated in t/loc_tools.pl and makedef.pl;  The three should be kept in
+ * sync. */
+#if   ! defined(NO_LOCALE)
+
+#  if ! defined(NO_POSIX_2008_LOCALE)           \
+   &&   defined(HAS_NEWLOCALE)                  \
+   &&   defined(HAS_USELOCALE)                  \
+   &&   defined(HAS_DUPLOCALE)                  \
+   &&   defined(HAS_FREELOCALE)                 \
+   &&   defined(LC_ALL_MASK)
+
+    /* For simplicity, the code is written to assume that any platform advanced
+     * enough to have the Posix 2008 locale functions has LC_ALL.  The final
+     * test above makes sure that assumption is valid */
+
+#    define HAS_POSIX_2008_LOCALE
+#    define USE_LOCALE
+#  elif defined(HAS_SETLOCALE)
+#    define USE_LOCALE
+#  endif
+#endif
+
+#ifdef USE_LOCALE
 #   define HAS_SKIP_LOCALE_INIT /* Solely for XS code to test for this
-                                   capability */
+                                   #define */
 #   if !defined(NO_LOCALE_COLLATE) && defined(LC_COLLATE) \
        && defined(HAS_STRXFRM)
 #      define USE_LOCALE_COLLATE
 #   if !defined(NO_LOCALE_TELEPHONE) && defined(LC_TELEPHONE)
 #      define USE_LOCALE_TELEPHONE
 #   endif
-#endif /* !NO_LOCALE && HAS_SETLOCALE */
 
 /* XXX The next few defines are unfortunately duplicated in makedef.pl, and
  * changes here MUST also be made there */
 
-#ifdef USE_LOCALE /* These locale things are all subject to change */
-#  if      defined(HAS_NEWLOCALE)               \
-      &&   defined(LC_ALL_MASK)                 \
-      &&   defined(HAS_FREELOCALE)              \
-      &&   defined(HAS_USELOCALE)               \
-      && ! defined(NO_POSIX_2008_LOCALE)
-
-    /* For simplicity, the code is written to assume that any platform advanced
-     * enough to have the Posix 2008 locale functions has LC_ALL.  The test
-     * above makes sure that assumption is valid */
-
-#    define HAS_POSIX_2008_LOCALE
-#  endif
+#  if ! defined(HAS_SETLOCALE) && defined(HAS_POSIX_2008_LOCALE)
+#      define USE_POSIX_2008_LOCALE
+#      ifndef USE_THREAD_SAFE_LOCALE
+#        define USE_THREAD_SAFE_LOCALE
+#      endif
                                    /* If compiled with
                                     * -DUSE_THREAD_SAFE_LOCALE, will do so even
                                     * on unthreaded builds */
-#  if    (defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE))         \
-      && (    defined(HAS_POSIX_2008_LOCALE)                                \
-          || (defined(WIN32) && defined(_MSC_VER) && _MSC_VER >= 1400))     \
-      && ! defined(NO_THREAD_SAFE_LOCALE)
+#  elif   (defined(USE_ITHREADS) || defined(USE_THREAD_SAFE_LOCALE))         \
+       && (    defined(HAS_POSIX_2008_LOCALE)                                \
+           || (defined(WIN32) && defined(_MSC_VER) && _MSC_VER >= 1400))     \
+       && ! defined(NO_THREAD_SAFE_LOCALE)
 #    ifndef USE_THREAD_SAFE_LOCALE
 #      define USE_THREAD_SAFE_LOCALE
 #    endif
@@ -4454,6 +4489,11 @@ EXTCONST char PL_Zero[]
 EXTCONST char PL_hexdigit[]
   INIT("0123456789abcdef0123456789ABCDEF");
 
+EXTCONST STRLEN PL_WARN_ALL
+  INIT(0);
+EXTCONST STRLEN PL_WARN_NONE
+  INIT(0);
+
 /* This is constant on most architectures, a global on OS/2 */
 #ifndef OS2
 EXTCONST char PL_sh_path[]
@@ -5986,11 +6026,19 @@ typedef struct am_table_short AMTS;
 #  define KEYWORD_PLUGIN_MUTEX_LOCK    MUTEX_LOCK(&PL_keyword_plugin_mutex)
 #  define KEYWORD_PLUGIN_MUTEX_UNLOCK  MUTEX_UNLOCK(&PL_keyword_plugin_mutex)
 #  define KEYWORD_PLUGIN_MUTEX_TERM    MUTEX_DESTROY(&PL_keyword_plugin_mutex)
+#  define USER_PROP_MUTEX_INIT    MUTEX_INIT(&PL_user_prop_mutex)
+#  define USER_PROP_MUTEX_LOCK    MUTEX_LOCK(&PL_user_prop_mutex)
+#  define USER_PROP_MUTEX_UNLOCK  MUTEX_UNLOCK(&PL_user_prop_mutex)
+#  define USER_PROP_MUTEX_TERM    MUTEX_DESTROY(&PL_user_prop_mutex)
 #else
 #  define KEYWORD_PLUGIN_MUTEX_INIT    NOOP
 #  define KEYWORD_PLUGIN_MUTEX_LOCK    NOOP
 #  define KEYWORD_PLUGIN_MUTEX_UNLOCK  NOOP
 #  define KEYWORD_PLUGIN_MUTEX_TERM    NOOP
+#  define USER_PROP_MUTEX_INIT    NOOP
+#  define USER_PROP_MUTEX_LOCK    NOOP
+#  define USER_PROP_MUTEX_UNLOCK  NOOP
+#  define USER_PROP_MUTEX_TERM    NOOP
 #endif
 
 #ifdef USE_LOCALE /* These locale things are all subject to change */
@@ -6208,7 +6256,7 @@ typedef struct am_table_short AMTS;
             else {                                                          \
                 PL_lc_numeric_mutex_depth++;                                \
                 DEBUG_Lv(PerlIO_printf(Perl_debug_log,                      \
-                        "%s: %d: avoided lc_numeric_lock; depth=%d\n",      \
+                        "%s: %d: avoided lc_numeric_lock; new depth=%d\n",  \
                         __FILE__, __LINE__, PL_lc_numeric_mutex_depth));    \
                 if (cond_to_panic_if_already_locked) {                      \
                     Perl_croak_nocontext("panic: %s: %d: Trying to change"  \
@@ -6230,7 +6278,7 @@ typedef struct am_table_short AMTS;
             else {                                                          \
                 PL_lc_numeric_mutex_depth--;                                \
                 DEBUG_Lv(PerlIO_printf(Perl_debug_log,                      \
-                        "%s: %d: avoided lc_numeric_unlock; depth=%d\n",    \
+                        "%s: %d: avoided lc_numeric_unlock; new depth=%d\n",\
                         __FILE__, __LINE__, PL_lc_numeric_mutex_depth));    \
             }                                                               \
         } STMT_END                                                          \
@@ -6380,8 +6428,8 @@ expression, but with an empty argument list, like this:
 #  define STORE_LC_NUMERIC_SET_TO_NEEDED()                                  \
         STMT_START {                                                        \
             LC_NUMERIC_LOCK(                                                \
-                          (IN_LC(LC_NUMERIC) && _NOT_IN_NUMERIC_UNDERLYING) \
-                      || _NOT_IN_NUMERIC_STANDARD);                         \
+                    (   (  IN_LC(LC_NUMERIC) && _NOT_IN_NUMERIC_UNDERLYING) \
+                     || (! IN_LC(LC_NUMERIC) && _NOT_IN_NUMERIC_STANDARD)));\
             if (IN_LC(LC_NUMERIC)) {                                        \
                 if (_NOT_IN_NUMERIC_UNDERLYING) {                           \
                     Perl_set_numeric_underlying(aTHX);                      \
@@ -6488,27 +6536,13 @@ expression, but with an empty argument list, like this:
 #endif /* !USE_LOCALE_NUMERIC */
 
 #define Atof                           my_atof
+#define Strtod                          my_strtod
 
-#ifdef USE_QUADMATH
-#  define Perl_strtod(s, e) strtoflt128(s, e)
-#elif defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE)
-#  if defined(__MINGW64_VERSION_MAJOR) && defined(HAS_STRTOLD)
-      /***********************************************
-       We are unable to use strtold because of
-        https://sourceforge.net/p/mingw-w64/bugs/711/
-        &
-        https://sourceforge.net/p/mingw-w64/bugs/725/
-
-       but __mingw_strtold is fine.
-      ***********************************************/
-#    define Perl_strtod(s, e) __mingw_strtold(s, e)
-#  elif defined(HAS_STRTOLD)
-#    define Perl_strtod(s, e) strtold(s, e)
-#  elif defined(HAS_STRTOD)
-#    define Perl_strtod(s, e) (NV)strtod(s, e) /* Unavoidable loss. */
-#  endif
-#elif defined(HAS_STRTOD)
-#  define Perl_strtod(s, e) strtod(s, e)
+#if    defined(HAS_STRTOD)                                          \
+   ||  defined(USE_QUADMATH)                                        \
+   || (defined(HAS_STRTOLD) && defined(HAS_LONG_DOUBLE)             \
+                            && defined(USE_LONG_DOUBLE))
+#  define Perl_strtod   Strtod
 #endif
 
 #if !defined(Strtol) && defined(USE_64_BIT_INT) && defined(IV_IS_QUAD) && \