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embed.fnc
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: BEGIN{die "You meant to run regen/embed.pl"} # Stop early if fed to perl.
:
: WARNING: The meanings of some flags have been changed as of v5.31.0
:
: This file is known to be processed by regen/embed.pl, autodoc.pl,
: makedef.pl, Devel::PPPort, and porting/diag.t.
:
: This file contains entries for various functions and macros defined by perl.
: Each entry includes the name, parameters, and various attributes about it.
: In most functions listed here, the name is a short name, and the function's
: real name is the short one, prefixed by either 'Perl_' (for publicly visible
: functions) or 'S_' (for internal-to-a-file static ones). In many instances a
: macro is defined that is the name in this file, and which expands to call the
: real (full) name, with any appropriate thread context paramaters, thus hiding
: that detail from the typical code.
:
: Many macros (as opposed to functions) listed here are the complete full name,
: though we may want to start converting those to have full names.
:
: All non-static functions defined by perl need to be listed in this file.
: embed.pl uses the entries here to construct:
: 1) proto.h to declare to the compiler the function interfaces; and
: 2) embed.h to create short name macros
:
: Static functions internal to a file need not appear here, but there is
: benefit to declaring them here:
: 1) It generally handles the thread context parameter invisibly making it
: trivial to add or remove needing thread context passed;
: 2) It defines a PERL_ARGS_ASSERT_foo macro, which can save you debugging
: time;
: 3) It is is automatically known to Devel::PPPort, making it quicker to
: later find out when it came into existence. For example
: perl ppport.h --api-info=/edit_distance/
: yields
: Supported at least since perl-5.23.8, with or without ppport.h.
:
: Lines in this file are of the form:
: flags|return_type|name|arg1|arg2|...|argN
:
: 'flags' is a string of single letters. Most of the flags are meaningful only
: to embed.pl; some only to autodoc.pl, and others only to makedef.pl. The
: comments here mostly don't include how Devel::PPPort or diag.t use them:
: All the possible flags and their meanings are given below.
:
: A function taking no parameters will have no 'arg' elements.
: A line may be continued onto the next by ending it with a backslash.
: Leading and trailing whitespace will be ignored in each component.
:
: Most entries here have a macro created with the entry name. This presents
: name space collision potentials which haven't been well thought out, but are
: now documented here. In practice this has rarely been an issue. At least,
: with a macro, the XS author can #undef it, unlike a function.
:
: The default without flags is to declare a function for internal perl-core use
: only. The short name is visible only when the PERL_CORE symbol is defined.
: On some platforms all non-static functions are currently externally visible.
: Because of this, and also for programs that embed perl, most non-static
: functions should have the 'p' flag to avoid namespace clashes.
:
: There are several advantages to using a macro instead of the full Perl_foo or
: S_foo form: it hides the need to know if the called function requires a
: thread context parameter or not, and the code using it is more readable
: because of fewer parameters being visible. And if there is some bug in it
: that gets fixed in a later release, ppport.h can be changed to automatically
: backport the fixed version to modules. The only disadvantage khw can think
: of is the namespace pollution one.
:
: WARNING: Any macro created in a header file is visible to XS code, unless
: care is taken to wrap it within C preprocessor guards like the following
:
: #if defined(PERL_CORE)
: ...
: #endif
:
: A common pattern is to use defines like 'PERL_IN_FILE_C' (with FILE_C being
: appropriately replaced with the real filename). Most, if not all, of the
: perl core C files define such a symbol before importing perl.h. Some groups
: of files define more generalized flags which are referenced in this file and
: the files generated from it.
:
: In general you should restrict the exposure of your exports as much as
: possible, although older code may not do so. Be aware that non-static
: exports can be "over exported" and things will likely work out fine, but
: inline and static macros will cause errors unless restricted to the specific
: file they are intended for, and the generated PERL_ARGS_ macros will only
: be available to inline functions in the appropriate context.
:
: From time to time it may be necessary to change or expand which files can
: see a function, therefore we prefer the '#if defined()' form of condition
: instead of the '#ifdef' form as the latter only works with one symbol and
: the former can be combined with more than one. It is also why you may see
: functions with an 's' or 'i' export type grouped together into a single
: conditional block separate from most of the other functions from the same
: file with 'p' in them.
:
: The 'A' flag is used to make a function and its short name visible everywhere
: on all platforms. This should be used to make it part of Perl's API
: contract with XS developers. The documentation for these is usually
: placed in perlapi. If no documentation exists, that fact is also
: noted in perlapi.
:
: The 'C' flag is used instead for functions and their short names that need to
: be accessible everywhere, typically because they are called from a
: publicly available macro or inline function, but they are not for
: public use by themselves. The documentation for these is placed in
: perlintern. If no documentation exists, that fact is also noted in
: perlintern.
:
: These really need the 'p' flag to avoid name space collisions.
:
: Some of these have been constructed so that the wrapper macro names
: begin with an underscore to lessen the chances of a name collision.
: However, this is contrary to the C standard, and those should be
: changed.
:
: The 'E' flag is used instead for a function and its short name that is
: supposed to be used only in the core plus extensions compiled with
: the PERL_EXT symbol defined. Again, on some platforms, the function
: will be visible everywhere, so one of the 'p' or 'S' flags is
: generally needed. Also note that an XS writer can always cheat and
: pretend to be an extension by #defining PERL_EXT.
:
: The 'X' flag is similar to the 'C' flag in that the function (whose entry
: better have the 'p' flag) is accessible everywhere on all platforms.
: However the short name macro that normally gets generated is
: suppressed outside the core. (Except it is also visible in PERL_EXT
: extensions if the 'E' flag is also specified.) This flag is used for
: functions that are called from a public macro, the name of which
: isn't derived from the function name. You'll have to write the macro
: yourself, and from within it, refer to the function in its full
: 'Perl_' form with any necessary thread context parameter.
:
: Just below is a description of the relevant parts of the automatic
: documentation generation system which heavily involves this file. Below that
: is a description of all the flags used in this file.
:
: Scattered around the perl source are lines of the form:
:
: =for apidoc name ...
: =for apidoc_item name ...
: =for apidoc_defn name ...
:
: The purpose of these lines is to furnish documentation for functions and
: macros. The lines tend to be placed near the source for the item they
: describe. autodoc.pl is run as part of the standard build process to
: extract this documentation and build either perlapi.pod (from the elements
: that are flagged as A in this file), or perlintern.pod (from the other
: elements.
:
: Functions need to be specified in this file, but macros may not necessarily
: be. The information in this file is sufficient to generate a usage line for
: the element to be documented; otherwise that information needs to be
: specified in the apidoc-ish lines.
:
: 'apidoc_defn' was added to supplement, for macros, the information in this
: file. It is designed to be placed at the point of definition of the macro
: it is for, so that the information can easily be checked for correctness,
: and you know at a glance that the macro actually has documentation. It
: doesn't by itself create any documentation; instead the other apidoc lines
: pull in information specified by these lines. Many of the lines in this
: file for macros that don't also have the 'p' flag (described below) could be
: pulled out of here and replaced by these lines throughout the source. It is
: a goal to do that as convenience dictates.
:
: The other apidoc lines either have the usage data as part of the line, or
: pull in the data from this file or apidoc_defn lines.
:
: Many macros and functions are variants of each other. It makes sense to use
: a single group to document such elements so their similarities and
: differences stand out, with less repetition than if there were separate
: entries. Such groups start with a plain 'apidoc' line, followed by any
: number of 'apidoc_item' lines. These indicate that the macro or function
: listed as 'name' on each is part of the group whose head entry is the one
: specified by 'name' on the apidoc line.
:
: After the block of apidoc-like statements, is the text that is the
: documentation, ending with the next =cut or '=for apidoc foo' lines.
:
: The apidoc_item lines must all come after the apidoc line and before the pod
: text for the entry. There need not be empty lines between the apidoc line
: and any of its apidoc_item lines.
:
: The entries in this file that have corresponding '=for apidoc' entries must
: have the 'd' flag set in this file.
:
: In C files, the apidoc lines are inside comment blocks. They may also be
: placed in pod files. In those, the =for causes lines from there until the
: next line beginning with an '=' to not be considered part of that pod.
:
: The 'h' flag is used to hide (suppress) the pod associated with =apidoc lines
: from being placed in the generated perlapi or perlintern. There are several
: reasons you might want to do this, given in the 'h' flag description below,
: but one is for the case where the =apidoc occurs in a file that contains
: regular pod. Without that flag, the associated pod will be placed in both
: it, and perlapi or perlintern. That may be what you want, but it gives you
: the flexibility to choose that, or instead have just a link to the source pod
: inserted in perlapi or perlintern. This allows single-source browsing for
: someone; they don't have to scan multiple pods trying to find whether
: something suitable exists.
:
: There are also lines of this form scattered around the perl
: source:
:
: =for apidoc_section Section Name
: =head1 Section Name
:
: These organize the resultant pod file into major subgroups of related
: functionality, but aren't tied to this embed.fnc file, and so are documented
: in autodoc.pl.
:
: What goes into the documentation of a particular function ends with the next
: line that begins with an '='. In particular, an '=cut' line ends that
: documentation without introducing something new.
:
: Various macros and other elements aren't listed here in embed.fnc (though
: they could be). They are documented in the same manner, but since they don't
: have this file to get information from, the defining lines have the syntax
: and meaning they do in this file, so it can be specified:
:
: =for apidoc flags|return_type|name|arg1|arg2|...|argN
: =for apidoc_item flags|return_type|name|arg1|arg2|...|argN
: =for apidoc_defn flags|return_type|name|arg1|arg2|...|argN
:
: The 'name' in any such line must not be the same as any in this file (i.e.,
: no redundant definitions), and one of the flags on the apidoc lines must be
: 'm' or 'y', indicating it is not a function.
:
: All but the name field of an apidoc_item line are optional, and if empty,
: inherits from a corresponding apidoc_defn line, if one exists, or the
: controlling plain apidoc line if none such exist. The flags field is
: generally empty, and in fact, the only flags it can have are ones directly
: related to its display. For example it might have the T flag to indicate no
: thread context parameter is used, whereas the apidoc entry does have a
: thread context. Here is an example:
:
: =for apidoc Am|char* |SvPV |SV* sv|STRLEN len
: =for apidoc_item |const char*|SvPV_const |SV* sv|STRLEN len
: =for apidoc_item |char* |SvPV_nolen |SV* sv
:
: Since these are macros, the arguments need not be legal C parameters. To
: indicate this to downstream software that inspects these lines, there are a
: few conventions. An example would be:
:
: =for apidoc Am|void|Newxc|void* ptr|int nitems|type|cast
:
: In this example, a real call of Newxc, 'type' would be specified as something
: like 'int' or 'char', and 'cast' by perhaps 'struct foo'.
:
: The complete list of conventions is:
: type the argument names a type
: cast the argument names a type which the macro casts to
: SP the argument is the stack pointer, SP
: block the argument is a C brace-enclosed block
: number the argument is a C numeric constant, like 3
: token the argument is a generic C preprocessor token, like abc
: "string" the argument is a literal C double-quoted string; what's important
: here are the quotes; for clarity, you can say whatever you want
: inside them
:
: Unlike other arguments, none of these is of the form 'int name'. There is no
: name.
:
: If any argument or return value is not one of the above, and isn't legal C
: language, the entry still can be specified, using the 'u' flag.
:
: 'return_type' in these lines can be empty, unlike in this file:
:
: =for apidoc Amnu||START_EXTERN_C
:
: Devel::PPPort also looks at both this file and the '=for apidoc' lines. In
: part it is to construct lists of elements that are or are not backported.
:
: makedef.pl uses this file for constructing the export list which lists the
: symbols that should be available on all platforms.
:
: porting/diag.t checks some things for consistency based on this file.
:
: The remainder of these introductory comments detail all the possible flags:
:
: 'A' Both long and short names are accessible fully everywhere (usually
: part of the public API). If the function is not part of the public
: API, instead use 'C', 'E', or 'X'.
:
: * adds entry to the list of symbols available on all platforms unless
: 'e' or 'm' are also specified;
: * any doc entry goes in perlapi.pod rather than perlintern.pod. If
: there isn't a doc entry, autodoc.pl lists this in perlapi as
: existing and being undocumented; unless 'x' is also specified, in
: which case it simply isn't listed.
: * makes the short name defined for everywhere, not just for PERL_CORE
: or PERL_EXT
:
: 'a' Allocates memory a la malloc/calloc. Also implies 'R'. This flag
: should only be on a function which returns "empty" memory which has no
: other pointers to it, and which does not contain any pointers to other
: things. So for example realloc() can not be 'a'.
:
: proto.h: add __attribute__malloc__
:
: 'b' Binary backward compatibility. This is used for functions which are
: kept only to not have to change legacy applications that call them. If
: there are no such legacy applications in a Perl installation for all
: functions flagged with this, the installation can run Configure with
: the -Accflags='-DNO_MATHOMS' parameter to not even compile them.
:
: If the function can be implemented as a macro (that evaluates its
: arguments exactly once), use the 'm' and 'p' flags together to implement
: this. (See the discussion under 'm'.) Another option for this is to
: use the 'M' flag.
:
: Without the m or M flags, these functions should be deprecated, and it
: is an error to not also specify the 'D' flag.
:
: The 'b' functions are normally moved to mathoms.c, but if
: circumstances dictate otherwise, they can be anywhere, provided the
: whole function is wrapped with
:
: #ifndef NO_MATHOMS
: ...
: #endif
:
: Note that this flag no longer automatically adds a 'Perl_' prefix to
: the name. Additionally specify 'p' to do that.
:
: This flag effectively causes nothing to happen if the perl interpreter
: is compiled with -DNO_MATHOMS (which causes any functions with this
: flag to not be compiled); otherwise these happen:
:
: * add entry to the list of symbols available on all platforms;
: * create PERL_ARGS_ASSERT_foo;
: * add embed.h entry (unless overridden by the 'M' or 'o' flags)
:
: 'C' Intended for core use only. This indicates to XS writers that they
: shouldn't be using this function. Devel::PPPort informs them of this,
: for example. Some functions have to be accessible everywhere even if
: they are not intended for public use. An example is helper functions
: that are called from inline ones that are publicly available.
:
: * add entry to the list of symbols available on all platforms unless e
: or m are also specified;
: * any doc entry goes in perlintern.pod rather than perlapi.pod. If
: there isn't a doc entry, autodoc.pl lists this in perlintern as
: existing and being undocumented
: * makes the short name defined for everywhere, not just for PERL_CORE
: or PERL_EXT
:
: 'D' Function is deprecated:
:
: proto.h: add __attribute__deprecated__
: autodoc.pl adds a note to this effect in the doc entry
:
: 'd' Function has documentation (somewhere) in the source:
:
: Enables 'no docs for foo" warning in autodoc.pl if the documentation
: isn't found.
:
: 'E' Visible to extensions included in the Perl core:
:
: in embed.h, change "#ifdef PERL_CORE"
: into "#if defined(PERL_CORE) || defined(PERL_EXT)"
:
: To be usable from dynamically loaded extensions, either:
: 1) it must be static to its containing file ('i' or 'S' flag); or
: 2) be combined with the 'X' flag.
:
: 'e' Not exported
:
: suppress entry in the list of symbols available on all platforms
:
: 'f' Function takes a format string. If the function name =~ qr/strftime/
: then it is assumed to take a strftime-style format string as the 1st
: arg; otherwise it's assumed to take a printf style format string, not
: necessarily the 1st arg. All the arguments following the second form
: (including possibly '...') are assumed to be for the format.
:
: embed.h: any entry in here for the second form is suppressed because
: of varargs
: proto.h: add __attribute__format__ (or ...null_ok__)
:
: 'F' Function has a '...' parameter, but don't assume it is a format. This
: is to make sure that new functions with formats can't be added without
: considering if they are format functions or not. A reason to use this
: flag even on a format function is if the format would generate error:
: format string argument is not a string type
:
: 'G' Suppress empty PERL_ARGS_ASSERT_foo macro. Normally such a macro is
: generated for all entries for functions 'foo' in this file. If there
: is a pointer argument to 'foo', it needs to be declared in this file
: as either NN or NULLOK, and the function definition must call its
: corresponding PERL_ARGS_ASSERT_foo macro (a porting test ensures this)
: which asserts at runtime (under DEBUGGING builds) that NN arguments
: are not NULL. If there aren't NN arguments, use of this macro is
: optional. Rarely, a function will define its own PERL_ARGS_ASSERT_foo
: macro, and in those cases, adding this flag to its entry in this file
: will suppress the normal one. It is not possible to suppress the
: generated macro if it isn't optional, that is, if there is at least
: one NN argument.
:
: proto.h: PERL_ARGS_ASSERT macro is not defined unless the function
: has NN arguments
:
: 'h' Hide any documentation that would normally go into perlapi or
: perlintern. This is typically used when the documentation is actually
: in another pod. If you don't use the 'h', that documentation is
: displayed in both places; with the flag, it stays in the pod, and a
: link to that pod is instead placed in perlapi or perlintern. This
: allows one to browse perlapi or perlintern and see all the potentially
: relevant elements. A good example is perlapio. It has documentation
: about PerlIO functions with other text giving context. There's no
: point in writing a second entry for perlapi, but it would be good if
: someone browsing perlapi knew about the function and where it is
: documented. By adding '=for apidoc' lines in perlapio, the appropriate
: text could be simply copied into perlapi if deemed appropriate, or
: just a link added there when the 'h' flag is specified.
:
: This flag is useful for symbolic names for flags. A single =for apidoc
: line can be added to the pod where the meaning is discussed, and
: perlapi will list the name, with a link to the pod. Another use would
: be if there are a bunch of macros which follow a common paradigm in
: their naming, so rather than having an entry for each slight
: variation, there is an overarching one. This flag is useful for
: downstream programs, such as Devel::PPPort.
:
: 'i' inline static. This is used for functions that the compiler is being
: requested to inline. If the function is in a header file its
: definition will be visible (unless guarded by #if..#endif) to all XS
: code. (A typical guard will be that it is being included in a
: particular C file(s) or in the perl core.) Therefore, all non-guarded
: functions should also have the 'p' flag specified to avoid polluting
: the XS code name space. Otherwise, this flag also turns on the 'S'
: flag.
:
: proto.h: function is declared as PERL_STATIC_INLINE
:
: 'I' This flag works exactly the same as 'i' but it also adds
: __attribute__((always_inline)) or __forceinline if either of them is
: supported by the compiler.
:
: proto.h: function is declared as PERL_STATIC_FORCE_INLINE and
: __attribute__always_inline__ is added
:
: 'm' Implemented as a macro; there is no function associated with this
: name. There is no long S_ name.
:
: However, you may #define the macro with a long name like 'Perl_foo',
: and specify the 'p' flag. This will cause an embed.h entry to be
: created that #defines 'foo' as 'Perl_foo'. This can be used to make
: any macro have a long name, perhaps to avoid name collisions. If
: instead you define the macro as 'PERL_FOO' (all uppercase), the
: embed.h entry will use all uppercase.
:
: It is particularly useful tp preserve backward compatibility when a
: function is converted to be a macro (remembering to not create a macro
: which evaluates its parameters more than once). Most of mathoms.c
: could be converted to use this facility. When there is no thread
: context involved, you just do something like
:
: #define Perl_foo(a, b, c) Perl_bar(a, b, 0, c)
:
: Otherwise consider this general case where there is a series of macros
: that build on the previous ones by calling something with a different
: name or with an extra parameter beyond what the previous one did:
:
: #define Perl_foo(mTHX, a) Perl_bar1(aTHX, a)
: #define Perl_bar1(mTHX, a) Perl_bar2(aTHX, a, 0)
: #define Perl_bar2(mTHX, a, b) Perl_bar3(aTHX, a, b, 0)
: #define Perl_bar3(mTHX, a, b, c) Perl_func(aTHX_ a, b, c, 0)
:
: Use the formal parameter name 'mTHX,' (which stands for "macro thread
: context") as the first in each macro definition, and call the next
: macro in the sequence with 'aTHX,' (Note the commas). Eventually, the
: sequence will end with a function call (or else there would be no need
: for thread context). For that instead call it with 'aTHX_' (with an
: underscore instead of a comma).
:
: suppress proto.h entry (actually, not suppressed, but commented out)
: suppress entry in the list of exported symbols available on all
: platforms
: suppress embed.h entry (when no 'p' flag), as the implementation
: should furnish the macro
:
: 'M' The implementation is furnishing its own macro instead of relying on
: the automatically generated short name macro (which simply expands to
: call the real name function). One reason to do this is if the
: parameters need to be cast from what the caller has. There is less
: need to do this now that 'm' and 'p' together is supported.
:
: This flag requires the 'p' flag to be specified, as there would be no
: need to do this if the function weren't publicly accessible before.
:
: The entry is processed based on the other flags, but the:
: embed.h entry is suppressed
:
: 'N' The name in the entry isn't strictly a name
:
: Normally, the name of the function or macro must contain all \w
: characters, and a warning is raised otherwise. This flag suppresses
: that warning, so that weird things can be documented
:
: 'n' Has no argument list (used only in =for apidoc entries)
:
: The macro (it can't be a function) is used without any parameters nor
: empty parentheses.
:
: Perhaps a better name for this flag would have been '0'. The reason
: the flag was not changed to that from 'n', is if D:P were to be
: regenerated on an older perl, it still would use the new embed.fnc
: shipped with it, but would be using the flags from the older perl
: source code.
:
: 'O' Has a perl_ compatibility macro.
:
: The really OLD name for API funcs.
:
: autodoc.pl adds a note that the perl_ form of this function is
: deprecated.
:
: 'o' Has no Perl_foo or S_foo compatibility macro:
:
: This is used for whatever reason to force the function to be called
: with the long name. Perhaps there is a varargs issue. Use the 'M'
: or 'm' flags instead for wrapper macros, and legacy-only functions
: should also use 'b'.
:
: embed.h: suppress "#define foo Perl_foo"
:
: mnemonic: 'omit' generated macro
:
: 'P' Pure function:
:
: A pure function has no effects except the return value, and the return
: value depends only on params and/or globals. This is a hint to the
: compiler that it can optimize calls to this function out of common
: subexpressions. Consequently if this flag is wrongly specified, it can
: lead to subtle bugs that vary by platform, compiler, compiler version,
: and optimization level. Also, a future commit could easily change a
: currently-pure function without even noticing this flag. So it should
: be used sparingly, only for functions that are unlikely to ever become
: not pure by future commits. It should not be used for static
: functions, as the compiler already has the information needed to make
: the 'pure' determination and doesn't need any hint; so it doesn't add
: value in those cases, and could be dangerous if it causes the compiler
: to skip doing its own checks. It should not be used on functions that
: touch SVs, as those can trigger unexpected magic. Also implies "R":
:
: proto.h: add __attribute__pure__
:
: 'p' Function or macro in source code has a Perl_ prefix:
:
: proto.h: function or macro is declared as Perl_foo rather than foo
: (though the entries for macros will be commented out)
: embed.h: "#define foo Perl_foo" entries added
:
: 'R' Return value must not be ignored (also implied by 'a' and 'P' flags):
:
: gcc has a bug (which they claim is a feature) in which casting the
: result of one of these to (void) doesn't silence the warning that the
: result is ignored. (Perl has a workaround for this bug, see
: PERL_UNUSED_RESULT docs)
:
: proto.h: add __attribute__warn_unused_result__
:
: 'r' Function never returns:
:
: proto.h: add __attribute__noreturn__
:
: 'S' Static function: function in source code has a S_ prefix:
:
: proto.h: function is declared as S_foo rather than foo,
: STATIC is added to declaration;
: embed.h: "#define foo S_foo" entries added
:
: 's' Static function, but function in source code has a Perl_ prefix:
:
: This is used for functions that have always had a Perl_ prefix, but
: have been moved to a header file and declared static.
:
: proto.h: function is declared as Perl_foo rather than foo
: STATIC is added to declaration;
: embed.h: "#define foo Perl_foo" entries added
:
: 'T' Has no implicit interpreter/thread context argument:
:
: suppress the pTHX part of "foo(pTHX...)" in proto.h;
: In the PERL_IMPLICIT_SYS branch of embed.h, generates
: "#define foo Perl_foo", rather than
: "#define foo(a,b,c) Perl_foo(aTHX_ a,b,c)
:
: 'u' The macro's (it has to be a macro) return value or parameters are
: unorthodox, and aren't in the list above of recognized weird ones. For
: example, they aren't C parameters, or the macro expands to something
: that isn't a symbol.
:
: For example, the expansion of STR_WITH_LEN is a comma separated pair
: of values, so would have this flag; or some macros take preprocessor
: tokens, so would have this flag.
:
: This also is used for entries that require processing for use, such as
: being compiled by xsubpp. This flag is an indication to downstream
: tools, such as Devel::PPPort, that this requires special handling.
:
: 'U' autodoc.pl will not output a usage example
:
: 'v' Guard the macro by !MULTIPLICITY || PERL_CORE if it uses __VA_ARGS__.
: This flag exists for backward-compatibility to ensure that code does
: not break when calling older functions without an aTHX in scope. It
: should not be added to newly-added functions as they will have no such
: compatibility issues.
:
: 'W' Add a comma_pDEPTH argument to function prototypes, and a comma_aDEPTH
: argument to the function calls. This means that under DEBUGGING a
: depth argument is added to the functions, which is used for example by
: the regex engine for debugging and trace output. A non DEBUGGING build
: will not pass the unused argument. Currently restricted to functions
: with at least one argument.
:
: 'X' Explicitly exported:
:
: add entry to the list of symbols available on all platforms, unless
: 'e' or 'm'
:
: This is often used for private functions that are used by public
: macros. In those cases the macros must use the long form of the name
: (Perl_blah(aTHX_ ...)).
:
: 'x' Experimental, may change:
:
: Any doc entry is marked that it may change. An undocumented
: experimental function is listed in perlintern rather than perlapi,
: even if it is allegedly API.
:
: 'y' Typedef. The element names a type rather than being a macro
:
: ';' autodoc.pl adds a terminating semi-colon to the usage example in the
: documentation.
:
: '#' The number sign flag indicates that this is a pre-processor symbol
: that is just #define'd or #undef'd. Must NOT be the first symbol on
: the line.
:
: '?' The question mark flag is used internally by Devel::PPPort to
: indicate that it does not have enough information to generate a
: proper test case.
:
: In this file, pointer parameters that must not be passed NULLs should be
: prefixed with NN.
:
: And, pointer parameters that may be NULL should be prefixed with NULLOK.
: This has no effect on output yet. It's a notation for the maintainers to
: know "I have defined whether NULL is OK or not" rather than having neither
: NULL or NULLOK, which is ambiguous.
:
: Pointer parameters that point to AVs, CVs or HVs will generate additional
: checks in the arguments assertion macro, that check on entry to the
: function that the SV being pointed to is of the intended type, by
: inspecting its SvTYPE(). For some functions this check may be inappropriate
: as in rare cases the arguments passed may not be of the correct type. To
: skip checking on an argument type, prefix its type with NOCHECK.
:
: Numeric arguments may also be prefixed with NZ, which will cause the
: appropriate asserts to be generated to validate that this is the case.
:
: Flags should be sorted asciibetically.
:
: Please keep the next line *BLANK*
pr |void |abort_execution|NULLOK SV *msg_sv \
|NN const char * const name
px |LOGOP *|alloc_LOGOP |I32 type \
|NULLOK OP *first \
|NULLOK OP *other
: Used in toke.c and perly.y
p |PADOFFSET|allocmy |NN const char * const name \
|const STRLEN len \
|const U32 flags
Xdp |bool |amagic_applies |NN SV *sv \
|int method \
|int flags
Adp |SV * |amagic_call |NN SV *left \
|NN SV *right \
|int method \
|int dir
Adp |SV * |amagic_deref_call \
|NN SV *ref \
|int method
p |bool |amagic_is_enabled \
|int method
ETXip |void |append_utf8_from_native_byte \
|const U8 byte \
|NN U8 **dest
: FIXME - this is only called by pp_chown. They should be merged.
p |SSize_t|apply |I32 type \
|NN SV **mark \
|NN SV **sp
Apx |void |apply_attrs_string \
|NN const char *stashpv \
|NN CV *cv \
|NN const char *attrstr \
|STRLEN len
Adp |OP * |apply_builtin_cv_attributes \
|NN CV *cv \
|NULLOK OP *attrlist
CTp |void |atfork_lock
CTp |void |atfork_unlock
Cop |SV ** |av_arylen_p |NN AV *av
Adp |void |av_clear |NN AV *av
ARdip |Size_t |av_count |NN AV *av
Adeop |void |av_create_and_push \
|NN AV ** const avp \
|NN SV * const val
Adeop |SV ** |av_create_and_unshift_one \
|NN AV ** const avp \
|NN SV * const val
Adp |SV * |av_delete |NN AV *av \
|SSize_t key \
|I32 flags
Adp |void |av_dump |NULLOK AV *av
ARdp |bool |av_exists |NN AV *av \
|SSize_t key
Adp |void |av_extend |NN AV *av \
|SSize_t key
p |void |av_extend_guts |NULLOK AV *av \
|SSize_t key \
|NN SSize_t *maxp \
|NN SV ***allocp \
|NN SV ***arrayp
ARdp |SV ** |av_fetch |NN AV *av \
|SSize_t key \
|I32 lval
CRdip |SV ** |av_fetch_simple|NN AV *av \
|SSize_t key \
|I32 lval
Adp |void |av_fill |NN AV *av \
|SSize_t fill
Cop |IV * |av_iter_p |NN AV *av
ARdp |SSize_t|av_len |NN AV *av
ARdp |AV * |av_make |SSize_t size \
|NN SV **strp
CRdip |AV * |av_new_alloc |SSize_t size \
|bool zeroflag
p |SV * |av_nonelem |NN AV *av \
|SSize_t ix
Adp |SV * |av_pop |NN AV *av
Adp |void |av_push |NN AV *av \
|NN SV *val
Adip |void |av_push_simple |NN AV *av \
|NN SV *val
: Used in scope.c, and by Data::Alias
EXp |void |av_reify |NN AV *av
ipx |void |av_remove_offset \
|NN AV *av
ARdp |SV * |av_shift |NN AV *av
Adp |SV ** |av_store |NN AV *av \
|SSize_t key \
|NULLOK SV *val
Cdip |SV ** |av_store_simple|NN AV *av \
|SSize_t key \
|NULLOK SV *val
Adp |void |av_undef |NN AV *av
Adp |void |av_unshift |NN AV *av \
|SSize_t num
: Used in perly.y
Rp |OP * |bind_match |I32 type \
|NN OP *left \
|NN OP *right
: Used in perly.y
ARdp |OP * |block_end |I32 floor \
|NULLOK OP *seq
CRp |U8 |block_gimme
Adopx |void |blockhook_register \
|NN BHK *hk
: Used in perly.y
ARdp |int |block_start |int full
p |void |boot_core_builtin
: Only used in perl.c
p |void |boot_core_mro
: Used in perl.c
p |void |boot_core_PerlIO
: Used in perl.c
p |void |boot_core_UNIVERSAL
p |OP * |build_infix_plugin \
|NN OP *lhs \
|NN OP *rhs \
|NN void *tokendata
EXp |const char *|_byte_dump_string \
|NULLOK const U8 * const start \
|const STRLEN len \
|const bool format
Adp |int |bytes_cmp_utf8 |NN const U8 *b \
|STRLEN blen \
|NN const U8 *u \
|STRLEN ulen
Adp |U8 * |bytes_from_utf8|NN const U8 *s \
|NN STRLEN *lenp \
|NN bool *is_utf8p
Adip |U8 * |bytes_to_utf8 |NN const U8 *s \
|NN STRLEN *lenp
Adp |U8 * |bytes_to_utf8_free_me \
|NN const U8 *s \
|NN STRLEN *lenp \
|NULLOK void **free_me
Adip |U8 * |bytes_to_utf8_temp_pv \
|NN const U8 *s \
|NN STRLEN *lenp
AOdp |SSize_t|call_argv |NN const char *sub_name \
|I32 flags \
|NN char **argv
: "Very" special - can't use the O flag for this one:
: (The rename from perl_atexit to Perl_call_atexit was in 864dbfa3ca8032ef)
Adp |void |call_atexit |ATEXIT_t fn \
|NULLOK void *ptr
Adp |const PERL_CONTEXT *|caller_cx \
|I32 level \
|NULLOK const PERL_CONTEXT **dbcxp
Cp |void |call_list |I32 oldscope \
|NN AV *paramList
AOdp |SSize_t|call_method |NN const char *methname \
|I32 flags
CTadop |Malloc_t|calloc |MEM_SIZE elements \
|MEM_SIZE size
AOdp |SSize_t|call_pv |NN const char *sub_name \
|I32 flags
AOdp |SSize_t|call_sv |NN SV *sv \
|I32 flags
: Used in several source files
Rp |bool |cando |Mode_t mode \
|bool effective \
|NN const Stat_t *statbufp
CRTp |I32 |cast_i32 |NV f
CRTp |IV |cast_iv |NV f
CRTp |U32 |cast_ulong |NV f
CRTp |UV |cast_uv |NV f
p |bool |check_utf8_print \
|NN const U8 *s \
|const STRLEN len
op |OP * |ck_entersub_args_core \
|NN OP *entersubop \
|NN GV *namegv \
|NN SV *protosv
Adp |OP * |ck_entersub_args_list \
|NN OP *entersubop
Adp |OP * |ck_entersub_args_proto \
|NN OP *entersubop \
|NN GV *namegv \
|NN SV *protosv
Adp |OP * |ck_entersub_args_proto_or_list \
|NN OP *entersubop \
|NN GV *namegv \
|NN SV *protosv
CPop |bool |ckwarn |U32 w
CPop |bool |ckwarn_d |U32 w
Adfpv |void |ck_warner |U32 err \
|NN const char *pat \
|...
Adfpv |void |ck_warner_d |U32 err \
|NN const char *pat \
|...
: Some static inline functions need predeclaration because they are used
: inside other static inline functions.
Cp |void |clear_defarray |NN AV *av \
|bool abandon
Cipx |void |clear_defarray_simple \
|NN AV *av
p |const COP *|closest_cop|NN const COP *cop \
|NULLOK const OP *o \
|NULLOK const OP *curop \
|bool opnext
Rp |OP * |cmpchain_extend|I32 type \
|NN OP *ch \
|NULLOK OP *right
Rp |OP * |cmpchain_finish|NN OP *ch
Rp |OP * |cmpchain_start |I32 type \
|NULLOK OP *left \
|NULLOK OP *right
ERTXp |const char *|cntrl_to_mnemonic \
|const U8 c
Adpx |const char *|cop_fetch_label \
|NN COP * const cop \
|NULLOK STRLEN *len \
|NULLOK U32 *flags
: Only used in op.c and the perl compiler
Adpx |void |cop_store_label|NN COP * const cop \
|NN const char *label \
|STRLEN len \
|U32 flags
: Used in pp.c
dp |SV * |core_prototype |NULLOK SV *sv \
|NN const char *name \
|const int code \
|NULLOK int * const opnum
: Used in gv.c
p |OP * |coresub_op |NN SV * const coreargssv \
|const int code \
|const int opnum
: Used in op.c and perl.c
px |void |create_eval_scope \
|NULLOK OP *retop \
|NN SV **sp \
|U32 flags
: croak()'s first parm can be NULL. Otherwise, mod_perl breaks.
Adfprv |void |croak |NULLOK const char *pat \
|...
Tfprv |void |croak_caller |NULLOK const char *pat \
|...
CTrs |void |croak_memory_wrap
Tpr |void |croak_no_mem
Tpr |void |croak_no_mem_ext \
|NN const char *context \
|STRLEN len
ATdpr |void |croak_no_modify
TXpr |void |croak_popstack
Adpr |void |croak_sv |NN SV *baseex
ATdpr |void |croak_xs_usage |NN const CV * const cv \
|NN const char * const params
CTp |Signal_t|csighandler1 |int sig
CTp |Signal_t|csighandler3 |int sig \
|NULLOK Siginfo_t *info \
|NULLOK void *uap
ATdmp |bool |c9strict_utf8_to_uv \
|NN const U8 * const s \
|NN const U8 * const e \
|NN UV *cp_p \
|NULLOK Size_t *advance_p
EXp |regexp_engine const *|current_re_engine
RXp |XOPRETANY|custom_op_get_field \
|NN const OP *o \
|const xop_flags_enum field
Adop |void |custom_op_register \
|NN Perl_ppaddr_t ppaddr \
|NN const XOP *xop
: Used in sv.c
EXpx |void |cv_ckproto_len_flags \
|NN const CV *cv \
|NULLOK const GV *gv \
|NULLOK const char *p \
|const STRLEN len \
|const U32 flags
Adp |CV * |cv_clone |NN CV *proto
p |CV * |cv_clone_into |NN CV *proto \
|NN CV *target
ARTdp |SV * |cv_const_sv |NULLOK const CV * const cv
RTp |SV * |cv_const_sv_or_av \
|NULLOK const CV * const cv
AMTdip |I32 * |CvDEPTH |NN const CV * const sv
dp |void |cv_forget_slab |NULLOK CV *cv
Adp |void |cv_get_call_checker \
|NN CV *cv \
|NN Perl_call_checker *ckfun_p \
|NN SV **ckobj_p
Adp |void |cv_get_call_checker_flags \
|NN CV *cv \
|U32 gflags \
|NN Perl_call_checker *ckfun_p \
|NN SV **ckobj_p \
|NN U32 *ckflags_p
AMdip |GV * |CvGV |NN CV *sv
Xop |GV * |cvgv_from_hek |NN CV *cv
Xp |void |cvgv_set |NN CV *cv \
|NULLOK GV *gv
Adp |SV * |cv_name |NN NOCHECK CV *cv \
|NULLOK SV *sv \
|U32 flags
Adp |void |cv_set_call_checker \
|NN CV *cv \
|NN Perl_call_checker ckfun \
|NN SV *ckobj
Adp |void |cv_set_call_checker_flags \
|NN CV *cv \
|NN Perl_call_checker ckfun \
|NN SV *ckobj \
|U32 ckflags
Xp |void |cvstash_set |NN CV *cv \
|NULLOK HV *stash
Adp |void |cv_undef |NN CV *cv
p |void |cv_undef_flags |NN CV *cv \
|U32 flags
Cp |void |cx_dump |NN PERL_CONTEXT *cx
: Used by CXINC, which appears to be in widespread use
CRp |I32 |cxinc
Adfpv |void |deb |NN const char *pat \
|...
Cdp |I32 |debop |NN const OP *o
Cdp |void |debprofdump
Adp |I32 |debstack
: Only used in dump.c
p |void |deb_stack_all
Cp |I32 |debstackptrs
p |void |debug_hash_seed|bool via_debug_h
Rp |SV * |defelem_target |NN SV *sv \
|NULLOK MAGIC *mg
: Used in op.c, perl.c
px |void |delete_eval_scope
ATdp |char * |delimcpy |NN char *to \
|NN const char *to_end \