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#define PERL_NO_GET_CONTEXT |
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include "ppport.h" |
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#include |
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#include |
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#include |
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// CopSTASH isn’t documented as part of the API but is heavily used |
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// on CPAN. There is PL_curstash, but that doesn’t work with, e.g., |
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// “perl -e'package Foo; _print_pl_curstash()'”, whereas PL_curcop does. |
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#define SP_CUR_STASH ( (HV*)CopSTASH(PL_curcop) ) |
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#define SP_CUR_PKGNAME HvNAME( SP_CUR_STASH ) |
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//---------------------------------------------------------------------- |
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static inline void _fd2sv( pTHX_ int fd, bool is_read, SV* sv ) { |
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PerlIO *pio = PerlIO_fdopen(fd, is_read ? "r" : "w"); |
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GV* gv = newGVgen( SP_CUR_PKGNAME ); |
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IO* io = GvIOn(gv); |
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SvUPGRADE(sv, SVt_IV); |
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SvROK_on(sv); |
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SvRV_set(sv, (SV*)gv); |
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IoTYPE(io) = is_read ? '<' : '>'; |
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IoIFP(io) = pio; |
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IoOFP(io) = pio; |
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} |
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int _sp_pipe( pTHX_ SV* infh, SV* outfh, int flags ) { |
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int fds[2]; |
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// This macro comes from Makefile.PL: |
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#ifdef SP_HAS_PIPE2 |
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3
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int ret = pipe2(fds, flags); |
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#else |
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if (flags != 0) { |
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croak("This system lacks pipe2 support, so pipe() cannot accept flags."); |
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} |
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int ret = pipe(fds); |
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#endif |
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3
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if (!ret) { |
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// These don’t seem to be available to extensions, |
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// but apparently they’re unneeded anyway. |
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// |
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// Perl_setfd_cloexec_for_nonsysfd(fds[0]); |
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// Perl_setfd_cloexec_for_nonsysfd(fds[1]); |
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_fd2sv( aTHX_ fds[0], true, infh ); |
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_fd2sv( aTHX_ fds[1], false, outfh ); |
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} |
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return ret; |
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} |
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//---------------------------------------------------------------------- |
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//---------------------------------------------------------------------- |
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MODULE = Sys::Pipe PACKAGE = Sys::Pipe |
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PROTOTYPES: DISABLE |
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BOOT: |
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2
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HV *stash = gv_stashpv("Sys::Pipe", FALSE); |
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2
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newCONSTSUB(stash, "has_pipe2", newSVuv( |
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#if SP_HAS_PIPE2 |
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1 |
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#else |
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0 |
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#endif |
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)); |
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SV* |
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pipe( SV *infh, SV *outfh, int flags = 0 ) |
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CODE: |
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3
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if (_sp_pipe(aTHX_ infh, outfh, flags)) { |
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0
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RETVAL = &PL_sv_undef; |
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} |
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else { |
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3
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RETVAL = newSVuv(1); |
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} |
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OUTPUT: |
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RETVAL |
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