From a8c08ecdc5ffec9869657a967edfe7b74a713a27 Mon Sep 17 00:00:00 2001 From: Nick Ing-Simmons Date: Sat, 16 Jun 2001 14:54:52 +0000 Subject: [PATCH] Work in progress UNIX-side edit of win32 PerLIO layer p4raw-id: //depot/perlio@10627 --- perlio.c | 10 +- win32/makefile.mk | 1 + win32/win32io.c | 316 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 325 insertions(+), 2 deletions(-) create mode 100644 win32/win32io.c diff --git a/perlio.c b/perlio.c index 2d57fb6..de16b2b 100644 --- a/perlio.c +++ b/perlio.c @@ -476,8 +476,14 @@ PerlIO_pop(pTHX_ PerlIO *f) { PerlIO_debug("PerlIO_pop f=%p %s\n",f,l->tab->name); if (l->tab->Popped) - (*l->tab->Popped)(f); - *f = l->next; + { + /* If popped returns non-zero do not free its layer structure + it has either done so itself, or it is shared and still in use + */ + if ((*l->tab->Popped)(f) != 0) + return; + } + *f = l->next;; PerlMemShared_free(l); } } diff --git a/win32/makefile.mk b/win32/makefile.mk index e9b9b54..4e2ff83 100644 --- a/win32/makefile.mk +++ b/win32/makefile.mk @@ -687,6 +687,7 @@ EXTRACORE_SRC += ..\perlio.c WIN32_SRC = \ .\win32.c \ + .\win32io.c \ .\win32sck.c \ .\win32thread.c diff --git a/win32/win32io.c b/win32/win32io.c new file mode 100644 index 0000000..e75919f --- /dev/null +++ b/win32/win32io.c @@ -0,0 +1,316 @@ +#define PERL_NO_GET_CONTEXT +#define WIN32_LEAN_AND_MEAN +#define WIN32IO_IS_STDIO +#include +#ifdef __GNUC__ +#define Win32_Winsock +#endif +#include + +#include +#include "EXTERN.h" +#include "perl.h" +#include "perllio.h" + +#define NO_XSLOCKS +#include "XSUB.h" + +/* Bottom-most level for Win32 case */ + +typedef struct +{ + struct _PerlIO base; /* The generic part */ + HANDLE h; /* OS level handle */ + IV refcnt; /* REFCNT for the "fd" this represents */ + int fd; /* UNIX like file descriptor - index into fdtable */ +} PerlIOWin32; + +PerlIOWin32 *fdtable[256]; +IV max_open_fd = -1; + +IV +PerlIOWin32_popped(PerlIO *f) +{ + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + if (--s->refcnt > 0) + { + *f = PerlIOBase(f)->next; + return 1; + } + fdtable[s->fd] = NULL; + return 0; +} + +IV +PerlIOWin32_fileno(PerlIO *f) +{ + return PerlIOSelf(f,PerlIOWin32)->fd; +} + +IV +PerlIOWin32_pushed(PerlIO *f, const char *mode, SV *arg) +{ + IV code = PerlIOBase_pushed(f,mode,arg); + if (*PerlIONext(f)) + { + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + s->fd = PerlIO_fileno(PerlIONext(f)); + } + PerlIOBase(f)->flags |= PERLIO_F_OPEN; + return code; +} + +PerlIO * +PerlIOWin32_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args) +{ + const char *tmode = mode; + HANDLE h = INVALID_HANDLE_VALUE; + if (f) + { + /* Close if already open */ + if (PerlIOBase(f)->flags & PERLIO_F_OPEN) + (*PerlIOBase(f)->tab->Close)(f); + } + if (narg > 0) + { + char *path = SvPV_nolen(*args); + DWORD access = 0; + DWORD share = 0; + DWORD create = -1; + DWORD attr = FILE_ATTRIBUTE_NORMAL; + if (*mode == '#') + { + /* sysopen - imode is UNIX-like O_RDONLY etc. + - do_open has converted that back to string form in mode as well + - perm is UNIX like permissions + */ + mode++; + } + else + { + /* Normal open - decode mode string */ + } + switch(*mode) + { + case 'r': + access = GENERIC_READ; + create = OPEN_EXISTING; + if (*++mode == '+') + { + access |= GENERIC_WRITE; + create = OPEN_ALWAYS; + mode++; + } + break; + + case 'w': + access = GENERIC_WRITE; + create = TRUNCATE_EXISTING; + if (*++mode == '+') + { + access |= GENERIC_READ; + mode++; + } + break; + + case 'a': + access = GENERIC_WRITE; + create = OPEN_ALWAYS; + if (*++mode == '+') + { + access |= GENERIC_READ; + mode++; + } + break; + } + if (*mode == 'b') + { + mode++; + } + else if (*mode == 't') + { + mode++; + } + if (*mode || oflags == -1) + { + SETERRNO(EINVAL,LIB$_INVARG); + return NULL; + } + if (!(access & GENERIC_WRITE)) + share = FILE_SHARE_READ; + h = CreateFile(path,access,share,NULL,create,attr,NULL); + if (h == INVALID_HANDLE_VALUE) + { + if (create == TRUNCATE_EXISTING) + h = CreateFile(path,access,share = OPEN_ALWAYS,NULL,create,attr,NULL); + } + } + else + { + /* fd open */ + h = INVALID_HANDLE_VALUE; + if (fd >= 0 && fd <= max_open_fd) + { + PerlIOWin32 *s = fdtable[fd]; + if (s) + { + s->refcnt++; + if (!f) + f = PerlIO_allocate(aTHX); + *f = &s->base; + return f; + } + if (*mode == 'I') + { + mode++; + switch(fd) + { + case 0: + h = GetStandardHandle(STD_INPUT_HANDLE); + break; + case 1: + h = GetStandardHandle(STD_OUTPUT_HANDLE); + break; + case 2: + h = GetStandardHandle(STD_ERROR_HANDLE); + break; + } + } + } + } + if (h != INVALID_HANDLE_VALUE) + { + PerlIOWin32 *s; + if (!f) + f = PerlIO_allocate(aTHX); + s = PerlIOSelf(PerlIO_push(aTHX_ f,self,tmode,PerlIOArg),PerlIOWin32); + s->ioh = h; + s->refcnt = 1; + return f; + } + if (f) + { + /* FIXME: pop layers ??? */ + } + return NULL; +} + +SSize_t +PerlIOWin32_read(PerlIO *f, void *vbuf, Size_t count) +{ + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + DWORD len; + if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) + return 0; + if (ReadFile(s->h,vbuf,count,&len,NULL) + { + return len; + } + else + { + if (GetLastError() != NO_ERROR) + { + PerlIOBase(f)->flags |= PERLIO_F_ERROR; + return -1; + } + else + { + if (count != 0) + PerlIOBase(f)->flags |= PERLIO_F_EOF; + return 0; + } + } +} + +SSize_t +PerlIOWin32_write(PerlIO *f, const void *vbuf, Size_t count) +{ + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + DWORD len; + if (WriteFile(s->h,vbuf,count,&len,NULL) + { + return len; + } + else + { + PerlIOBase(f)->flags |= PERLIO_F_ERROR; + return -1; + } +} + +IV +PerlIOWin32_seek(PerlIO *f, Off_t offset, int whence) +{ + static const DWORD where[3] = { FILE_BEGIN, FILE_CURRENT, FILE_END }; + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + DWORD high = (sizeof(offset) > sizeof(DWORD)) ? (DWORD)(offset >> 32) : 0; + DWORD low = (DWORD) offset; + DWORD res = SetFilePointer(s->h,low,&high,where[whence]); + if (res != 0xFFFFFFFF || GetLastError() != NO_ERROR) + { + return 0; + } + else + { + return -1; + } +} + +Off_t +PerlIOWin32_tell(PerlIO *f) +{ + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + DWORD high = 0; + DWORD res = SetFilePointer(s->h,0,&high,FILE_CURRENT); + if (res != 0xFFFFFFFF || GetLastError() != NO_ERROR) + { + return ((Off_t) high << 32) | res; + } + return (Off_t) -1; +} + +IV +PerlIOWin32_close(PerlIO *f) +{ + PerlIOWin32 *s = PerlIOSelf(f,PerlIOWin32); + if (s->refcnt == 1) + { + if (CloseHandle(s->h)) + { + s->h = INVALID_HANDLE_VALUE; + return -1; + } + } + PerlIOBase(f)->flags &= ~PERLIO_F_OPEN; + return 0; +} + +PerlIO_funcs PerlIO_win32 = { + "win32", + sizeof(PerlIOWin32), + PERLIO_K_RAW, + PerlIOWin32_pushed, + PerlIOWin32_popped, + PerlIOWin32_open, + NULL, /* getarg */ + PerlIOWin32_fileno, + PerlIOWin32_read, + PerlIOBase_unread, + PerlIOWin32_write, + PerlIOWin32_seek, + PerlIOWin32_tell, + PerlIOWin32_close, + PerlIOBase_noop_ok, /* flush */ + PerlIOBase_noop_fail, /* fill */ + PerlIOBase_eof, + PerlIOBase_error, + PerlIOBase_clearerr, + PerlIOBase_setlinebuf, + NULL, /* get_base */ + NULL, /* get_bufsiz */ + NULL, /* get_ptr */ + NULL, /* get_cnt */ + NULL, /* set_ptrcnt */ +}; + + -- 2.7.4