pike.git/src/modules/Pipe/pipe.c:f2c730abbad0708ffec1dd52d2b155a95c2212ce

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 #include "config.h" #include "machine.h" #include <sys/types.h> #include <sys/stat.h> #include <errno.h> #ifdef HAVE_SYS_MMAN_H #include <sys/mman.h> #else #ifdef HAVE_LINUX_MMAN_H #include <linux/mman.h> #else #ifdef HAVE_MMAP /* sys/mman.h is _probably_ there anyway. */ #include <sys/mman.h> #endif #endif #endif #include <fcntl.h> #include "global.h" RCSID("$Id: pipe.c,v 1.20 1998/04/06 20:40:04 hubbe Exp $"); #include "threads.h" #include "stralloc.h" #include "pike_macros.h" #include "object.h" #include "constants.h" #include "interpret.h" #include "svalue.h" #include "error.h" #include "builtin_functions.h" #ifndef S_ISREG #ifdef S_IFREG #define S_ISREG(mode) (((mode) & (S_IFMT)) == (S_IFREG)) #else #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG)) #endif #endif /* #define PIPE_STRING_DEBUG #define PIPE_MMAP_DEBUG #define PIPE_FILE_DEBUG #define BLOCKING_CLOSE */ #if 0 #define INSISTANT_WRITE #endif #ifndef MAP_FILE # define MAP_FILE 0 #endif #define READ_BUFFER_SIZE 65536 #define MAX_BYTES_IN_BUFFER 65536 /* * usage: * single socket output * or regular file output and (multiple, adding) socket output * with no mmap input * * multiple socket output without regular file output illegal */ static struct program *pipe_program, *output_program; #ifdef THIS #undef THIS #endif #define THIS ((struct pipe *)(fp->current_storage)) #define THISOBJ (fp->current_object) struct input { enum { I_NONE,I_OBJ,I_BLOCKING_OBJ,I_STRING,I_MMAP } type; union { struct object *obj; struct pike_string *str; char *mmap; } u; unsigned long len; /* current input: string or mmap len */ int set_blocking_offset, set_nonblocking_offset; struct input *next; }; struct output { struct object *obj; int write_offset, set_blocking_offset, set_nonblocking_offset; int fd; enum { O_RUN, /* waiting for callback */ O_SLEEP /* sleeping; waiting for more data */ } mode; unsigned long pos; /* position in buffer */ struct object *next; struct pipe *the_pipe; }; struct buffer { struct pike_string *s; struct buffer *next; }; struct pipe { int living_outputs; /* number of output objects */ struct svalue done_callback; struct svalue output_closed_callback; struct svalue id; /* * if fd is -1: use fd * else firstinput's type is I_MMAP: use firstinput's mmap * else use buffer */ int fd; /* buffer fd or -1 */ unsigned long bytes_in_buffer; unsigned long pos; /* fd: size of buffer file */ /* current position of first element (buffer or mmap) */ struct buffer *firstbuffer,*lastbuffer; short sleeping; /* sleeping; buffer is full */ short done; struct input *firstinput,*lastinput; struct object *firstoutput; unsigned long sent; }; static int offset_input_read_callback; static int offset_input_close_callback; static int offset_output_write_callback; static int offset_output_close_callback; static int mmapped, nobjects, nstrings, noutputs, ninputs, nbuffers, sbuffers; void close_and_free_everything(struct object *o,struct pipe *); static INLINE void output_finish(struct object *obj); static INLINE void output_try_write_some(struct object *obj); /********** internal ********************************************************/ /* Push a callback to this object given the internal function number. */ static void push_callback(int no) { sp->u.object=THISOBJ; THISOBJ->refs++; sp->subtype=no+fp->context.identifier_level; sp->type=T_FUNCTION; sp++; } /* Allocate a new struct input, link it last in the linked list */ static INLINE struct input *new_input(void) { struct input *i; ninputs++; i=ALLOC_STRUCT(input); i->type=I_NONE; i->next=NULL; if (THIS->lastinput) THIS->lastinput->next=i; else THIS->firstinput=i; THIS->lastinput=i; return i; } /* Free an input struct and all that it stands for */ static INLINE void free_input(struct input *i) { ninputs--; switch (i->type) { case I_OBJ: case I_BLOCKING_OBJ: if (!i->u.obj) break; if (i->u.obj->prog) { #ifdef BLOCKING_CLOSE apply_low(i->u.obj,i->set_blocking_offset,0); pop_stack(); #endif apply(i->u.obj,"close",0); pop_stack(); destruct(i->u.obj); } free_object(i->u.obj); nobjects--; i->u.obj=0; break; case I_STRING: free_string(i->u.str); nstrings--; break; case I_MMAP: #if defined(HAVE_MMAP) && defined(HAVE_MUNMAP) munmap(i->u.mmap,i->len); mmapped -= i->len; #else error("I_MMAP input when MMAP is diabled!"); #endif break; case I_NONE: break; } free((char *)i); } /* do the done_callback, then close and free everything */ static INLINE void pipe_done(void) { if (THIS->done_callback.type!=T_INT) { assign_svalue_no_free(sp++,&THIS->id); apply_svalue(&(THIS->done_callback),1); pop_stack(); if(!THISOBJ->prog) /* We will not free anything in this case. */ return; /* error("Pipe done callback destructed pipe.\n"); */ } close_and_free_everything(THISOBJ,THIS); } static void finished_p(void) { if(THIS->done) return; if(THIS->fd != -1) { if(THIS->living_outputs > 1) return; if(THIS->firstinput) return; }else{ if(THIS->living_outputs) return; } pipe_done(); } /* Allocate a new buffer and put it at the end of the chain of buffers * scheduled for output. Return 1 if we have more bytes in buffers * than allowed afterwards. */ static INLINE int append_buffer(struct pike_string *s) /* 1=buffer full */ { struct buffer *b; if(THIS->fd!= -1) { lseek(THIS->fd,THIS->pos,0); write(THIS->fd,s->str,s->len); THIS->pos+=s->len; return 0; } else { nbuffers++; b=ALLOC_STRUCT(buffer); b->next=NULL; b->s=s; sbuffers += s->len; s->refs++; if (THIS->lastbuffer) THIS->lastbuffer->next=b; else THIS->firstbuffer=b; THIS->lastbuffer=b; THIS->bytes_in_buffer+=s->len; } return THIS->bytes_in_buffer > MAX_BYTES_IN_BUFFER; } /* Wake up the sleepers */ static void low_start(void) { struct object *obj, *next; struct output *o; THISOBJ->refs++; /* dont kill yourself now */ for(obj=THIS->firstoutput;obj;obj=next) { obj->refs++; /* Hang on PLEASE!! /hubbe */ o=(struct output *)(obj->storage); if (o->obj && o->mode==O_SLEEP) { if (!o->obj->prog) { output_finish(obj); } else { #if 0 push_int(0); push_callback(offset_output_write_callback); push_callback(offset_output_close_callback); apply_low(o->obj,o->set_nonblocking_offset,3); #endif output_try_write_some(obj); o->mode=O_RUN; /* Hubbe */ } } next=o->next; free_object(obj); } free_object(THISOBJ); } /* Read some data from the blocking object. * */ static int read_some_data(void) { struct pipe *this = THIS; struct input * i = this->firstinput; if (!i || i->type != I_BLOCKING_OBJ) { fatal("PIPE: read_some_data(): Bad input type!\n"); return -1; } push_int(8192); push_int(1); /* We don't care if we don't get all 8192 bytes. */ apply(i->u.obj, "read", 2); if ((sp[-1].type == T_STRING) && (sp[-1].u.string->len > 0)) { append_buffer(sp[-1].u.string); pop_stack(); THIS->sleeping = 1; return(1); /* Success */ } /* FIXME: Should we check the return value here? */ pop_stack(); /* EOF */ return(0); /* EOF */ } /* Let's guess what this function does.... * */ static INLINE void input_finish(void) { struct input *i; while(1) { /* Get the next input from the queue */ i=THIS->firstinput->next; free_input(THIS->firstinput); THIS->firstinput=i; if(!i) break; switch(i->type) { case I_OBJ: THIS->sleeping=0; push_callback(offset_input_read_callback); push_int(0); push_callback(offset_input_close_callback); apply_low(i->u.obj,i->set_nonblocking_offset,3); pop_stack(); return; case I_BLOCKING_OBJ: if (read_some_data()) return; continue; case I_MMAP: if (THIS->fd==-1) return; continue; case I_STRING: append_buffer(i->u.str); case I_NONE: break; } } THIS->sleeping=0; low_start(); finished_p(); } /* This function reads some data from the file cache.. * Called when we want some data to send. */ static INLINE struct pike_string* gimme_some_data(unsigned long pos) { struct buffer *b; long len; struct pipe *this = THIS; /* We have a file cache, read from it */ if (this->fd!=-1) { char buffer[READ_BUFFER_SIZE]; if (this->pos<=pos) return NULL; /* no data */ len=this->pos-pos; if (len>READ_BUFFER_SIZE) len=READ_BUFFER_SIZE; THREADS_ALLOW(); lseek(this->fd, pos, 0); /* SEEK_SET */ THREADS_DISALLOW(); do { THREADS_ALLOW(); len = read(this->fd, buffer, len); THREADS_DISALLOW(); if (len < 0) { if (errno != EINTR) { return(NULL); } } } while(len < 0); return make_shared_binary_string(buffer,len); } if (pos<this->pos) return make_shared_string("buffer underflow"); /* shit */ /* We want something in the next buffer */ while (this->firstbuffer && pos>=this->pos+this->firstbuffer->s->len) { /* Free the first buffer, and update THIS->pos */ b=this->firstbuffer; this->pos+=b->s->len; this->bytes_in_buffer-=b->s->len; this->firstbuffer=b->next; if (!b->next) this->lastbuffer=NULL; sbuffers-=b->s->len; nbuffers--; free_string(b->s); free((char *)b); /* Wake up first input if it was sleeping and we * have room for more in the buffer. */ if (this->sleeping && this->firstinput && this->bytes_in_buffer<MAX_BYTES_IN_BUFFER) { if (this->firstinput->type == I_BLOCKING_OBJ) { if (!read_some_data()) { this->sleeping = 0; input_finish(); } } else { this->sleeping=0; push_callback(offset_input_read_callback); push_int(0); push_callback(offset_input_close_callback); apply(this->firstinput->u.obj, "set_nonblocking", 3); pop_stack(); } } } while (!this->firstbuffer) { if (this->firstinput) { #if defined(HAVE_MMAP) && defined(HAVE_MUNMAP) if (this->firstinput->type==I_MMAP) { char *src; struct pike_string *tmp; if (pos >= this->firstinput->len + this->pos) /* end of mmap */ { this->pos += this->firstinput->len; input_finish(); continue; } len = this->firstinput->len + this->pos - pos; if (len > READ_BUFFER_SIZE) len=READ_BUFFER_SIZE; tmp = begin_shared_string( len ); src = this->firstinput->u.mmap + pos - this->pos; /* This thread_allow/deny is at the cost of one extra memory copy */ THREADS_ALLOW(); MEMCPY(tmp->str, src, len); THREADS_DISALLOW(); return end_shared_string(tmp); } else #endif if (this->firstinput->type!=I_OBJ) { /* FIXME: What about I_BLOCKING_OBJ? */ input_finish(); /* shouldn't be anything else ... maybe a finished object */ } } return NULL; /* no data */ } if (pos==this->pos) { this->firstbuffer->s->refs++; return this->firstbuffer->s; } return make_shared_binary_string(this->firstbuffer->s->str+ pos-this->pos, this->firstbuffer->s->len- pos+this->pos); } /* * close and free the contents of a struct output * Note that the output struct is not freed or unlinked here, * that is taken care of later. */ static INLINE void output_finish(struct object *obj) { struct output *o; o=(struct output *)(obj->storage); if (o->obj) { if(o->obj->prog) { #ifdef BLOCKING_CLOSE apply_low(o->obj,o->set_blocking_offset,0); pop_stack(); #endif push_int(0); apply(o->obj,"set_id",1); pop_stack(); apply(o->obj,"close",0); pop_stack(); if(!THISOBJ->prog) error("Pipe done callback destructed pipe.\n"); destruct(o->obj); } free_object(o->obj); noutputs--; o->obj=NULL; THIS->living_outputs--; finished_p(); /* Moved by per, one line down.. :) */ free_object(THISOBJ); /* What? /Hubbe */ } } /* * Try to write some data to our precious output */ static INLINE void output_try_write_some(struct object *obj) { struct output *out; struct pike_string *s; unsigned long len; INT32 ret; out=(struct output*)(obj->storage); #ifdef INSISTANT_WRITE do { #endif /* Get some data to write */ s=gimme_some_data(out->pos); if (!s) /* out of data */ { /* out of data, goto sleep */ if (!THIS->firstinput || !out->obj->prog) /* end of life */ { output_finish(obj); } else { #if 0 apply_low(out->obj, out->set_blocking_offset, 0); pop_stack(); /* from apply */ #endif out->mode=O_SLEEP; } return; } len=s->len; push_string(s); apply_low(out->obj,out->write_offset,1); out->mode=O_RUN; ret=-1; if(sp[-1].type == T_INT) ret=sp[-1].u.integer; pop_stack(); if (ret==-1) /* error, byebye */ { output_finish(obj); return; } out->pos+=ret; THIS->sent+=ret; #ifdef INSISTANT_WRITE } while(ret == len); #endif } /********** methods *********************************************************/ /* Add an input to this pipe */ static void pipe_input(INT32 args) { struct input *i; int fd=-1; /* Per, one less warning to worry about... */ char *m; struct stat s; struct object *obj; if (args<1 || sp[-args].type != T_OBJECT) error("Bad/missing argument 1 to pipe->input().\n"); obj=sp[-args].u.object; if(!obj || !obj->prog) error("pipe->input() on destructed object.\n"); push_int(0); apply(sp[-args-1].u.object,"set_id", 1); pop_stack(); i=new_input(); #if defined(HAVE_MMAP) && defined(HAVE_MUNMAP) /* We do not handle mmaps if we have a buffer */ if(THIS->fd == -1) { apply(obj, "query_fd", 0); if(sp[-1].type == T_INT) fd=sp[-1].u.integer; pop_stack(); if (fd != -1 && fstat(fd,&s)==0) { int filep=lseek(fd, 0L, SEEK_CUR); /* keep the file pointer */ if(S_ISREG(s.st_mode) /* regular file */ && ((long)(m=(char *)mmap(0,s.st_size - filep,PROT_READ, MAP_FILE|MAP_SHARED,fd,filep))!=-1)) { #ifdef HAVE_GETEUID int ou = 0; #endif mmapped += s.st_size; i->type=I_MMAP; i->len=s.st_size; i->u.mmap=m; #ifdef HAVE_MADVISE /* Mark the pages as sequential read only access... */ /* NOTE: * * Potential race-condition with other threads */ #ifdef HAVE_GETEUID if((ou=geteuid()) && !getuid()) { #ifdef HAVE_SETEUID seteuid(0); #else /* ! HAVE_SETEUID */ #ifdef HAVE_SETREUID setresuid(-1, 0, -1); #endif /* HAVE_SETRESUID */ #endif /* HAVE_SETEUID */ } #endif madvise(m, s.st_size, MADV_SEQUENTIAL); #ifdef HAVE_GETEUID if(ou) { #ifdef HAVE_SETEUID seteuid(ou); #else /* ! HAVE_SETEUID */ #ifdef HAVE_SETREUID setresuid(-1, ou, -1); #endif /* HAVE_SETRESUID */ #endif /* HAVE_SETEUID */ } #endif #endif pop_n_elems(args); push_int(0); return; } } } #endif i->u.obj=obj; nobjects++; i->type=I_OBJ; i->u.obj->refs++; i->set_nonblocking_offset=find_identifier("set_nonblocking",i->u.obj->prog); i->set_blocking_offset=find_identifier("set_blocking",i->u.obj->prog); if (i->set_nonblocking_offset<0 || i->set_blocking_offset<0) { if (find_identifier("read", i->u.obj->prog) < 0) { /* Not even a read function */ free_object(i->u.obj); i->u.obj=NULL; i->type=I_NONE; nobjects--; error("illegal file object%s%s\n", ((i->set_nonblocking_offset<0)?"; no set_nonblocking":""), ((i->set_blocking_offset<0)?"; no set_blocking":"")); } else { /* Try blocking mode */ i->type = I_BLOCKING_OBJ; if (i==THIS->firstinput) { read_some_data(); } return; } } if (i==THIS->firstinput) { push_callback(offset_input_read_callback); push_int(0); push_callback(offset_input_close_callback); apply_low(i->u.obj,i->set_nonblocking_offset,3); pop_stack(); } else { /* DOESN'T WORK!!! */ push_int(0); push_int(0); push_callback(offset_input_close_callback); apply_low(i->u.obj,i->set_nonblocking_offset,3); pop_stack(); } pop_n_elems(args); push_int(0); } static void pipe_write(INT32 args) { struct input *i; if (args<1 || sp[-args].type!=T_STRING) error("illegal argument to pipe->write()\n"); if (!THIS->firstinput) { append_buffer(sp[-args].u.string); pop_n_elems(args); push_int(0); return; } i=new_input(); i->type=I_STRING; nstrings++; i->u.str=sp[-args].u.string; i->u.str->refs++; pop_n_elems(args-1); } void f_mark_fd(INT32 args); static void pipe_output(INT32 args) { struct object *obj; struct output *o; int fd; struct stat s; struct buffer *b; if (args<1 || sp[-args].type != T_OBJECT || !sp[-args].u.object || !sp[-args].u.object->prog) error("Bad/missing argument 1 to pipe->output().\n"); if (THIS->fd==-1) /* no buffer */ { /* test if usable as buffer */ apply(sp[-args].u.object,"query_fd",0); if ((sp[-1].type==T_INT) && (fd=sp[-1].u.integer)>=0 && (fstat(fd,&s)==0) && S_ISREG(s.st_mode) && (THIS->fd=dup(fd))!=-1 ) { /* keep the file pointer of the duped fd */ THIS->pos=lseek(fd, 0L, SEEK_CUR); #if 0 /* This won't work if the spider-module is dynamically linked. */ push_int(THIS->fd); push_string(make_shared_string("pipe.c: file buffer")); f_mark_fd(2); pop_stack(); #endif /* 0 */ THIS->living_outputs++; while (THIS->firstbuffer) { b=THIS->firstbuffer; THIS->firstbuffer=b->next; lseek(THIS->fd,THIS->pos,0); write(THIS->fd,b->s->str,b->s->len); sbuffers-=b->s->len; nbuffers--; free_string(b->s); free((char *)b); } THIS->lastbuffer=NULL; /* keep the file pointer of the duped fd THIS->pos=0; */ push_int(0); apply(sp[-args-2].u.object,"set_id", 1); pop_n_elems(args+2); /* ... and from apply x 2 */ return; } pop_stack(); /* from apply */ } THIS->living_outputs++; THISOBJ->refs++; /* Weird */ /* Allocate a new struct output */ obj=clone_object(output_program,0); o=(struct output *)(obj->storage); o->next=THIS->firstoutput; THIS->firstoutput=obj; noutputs++; o->obj=NULL; o->obj=sp[-args].u.object; o->obj->refs++; o->write_offset=find_identifier("write",o->obj->prog); o->set_nonblocking_offset=find_identifier("set_nonblocking",o->obj->prog); o->set_blocking_offset=find_identifier("set_blocking",o->obj->prog); if (o->write_offset<0 || o->set_nonblocking_offset<0 || o->set_blocking_offset<0) { free_object(o->obj); error("illegal file object%s%s%s\n", ((o->write_offset<0)?"; no write":""), ((o->set_nonblocking_offset<0)?"; no set_nonblocking":""), ((o->set_blocking_offset<0)?"; no set_blocking":"")); } o->mode=O_RUN; /* keep the file pointer of the duped fd o->pos=0; */ o->pos=THIS->pos; push_object(obj); obj->refs++; apply(o->obj,"set_id",1); pop_stack(); push_int(0); push_callback(offset_output_write_callback); push_callback(offset_output_close_callback); apply_low(o->obj,o->set_nonblocking_offset,3); pop_stack(); pop_n_elems(args-1); } static void pipe_set_done_callback(INT32 args) { if (args==0) { free_svalue(&THIS->done_callback); THIS->done_callback.type=T_INT; return; } if (args<1 || (sp[-args].type!=T_FUNCTION && sp[-args].type!=T_ARRAY)) error("Illegal argument to set_done_callback()\n"); if (args>1) { free_svalue(&THIS->id); assign_svalue_no_free(&(THIS->id),sp-args+1); } free_svalue(&THIS->done_callback); assign_svalue_no_free(&(THIS->done_callback),sp-args); pop_n_elems(args-1); } static void pipe_set_output_closed_callback(INT32 args) { if (args==0) { free_svalue(&THIS->done_callback); THIS->output_closed_callback.type=T_INT; return; } if (args<1 || (sp[-args].type!=T_FUNCTION && sp[-args].type!=T_ARRAY)) error("Illegal argument to set_output_closed_callback()\n"); if (args>1) { free_svalue(&THIS->id); assign_svalue_no_free(&(THIS->id),sp-args+1); } free_svalue(&THIS->output_closed_callback); assign_svalue_no_free(&(THIS->output_closed_callback),sp-args); pop_n_elems(args-1); } static void pipe_finish(INT32 args) { pop_n_elems(args); push_int(0); pipe_done(); } static void pipe_start(INT32 args) /* force start */ { low_start(); if(args) pop_n_elems(args-1); } static void f_bytes_sent(INT32 args) { pop_n_elems(args); push_int(THIS->sent); } /********** callbacks *******************************************************/ static void pipe_write_output_callback(INT32 args) { if (args<1 || sp[-args].type!=T_OBJECT) error("Illegal argument to pipe->write_output_callback\n"); if(!sp[-args].u.object->prog) return; if(sp[-args].u.object->prog != output_program) error("Illegal argument to pipe->write_output_callback\n"); output_try_write_some(sp[-args].u.object); pop_n_elems(args-1); } static void pipe_close_output_callback(INT32 args) { struct output *o; if (args<1 || sp[-args].type!=T_OBJECT) if(!sp[-args].u.object->prog) return; if(sp[-args].u.object->prog != output_program) error("Illegal argument to pipe->close_output_callback\n"); o=(struct output *)(sp[-args].u.object->storage); if (THIS->output_closed_callback.type!=T_INT) { assign_svalue_no_free(sp++,&THIS->id); push_object(o->obj); apply_svalue(&(THIS->output_closed_callback),2); pop_stack(); } output_finish(sp[-args].u.object); pop_n_elems(args-1); } static void pipe_read_input_callback(INT32 args) { struct input *i; struct pike_string *s; if (args<2 || sp[1-args].type!=T_STRING) error("Illegal argument to pipe->read_input_callback\n"); i=THIS->firstinput; if (!i) error("Pipe read callback without any inputs left.\n"); s=sp[1-args].u.string; if(append_buffer(s)) { /* THIS DOES NOT WORK */ push_int(0); push_int(0); push_callback(offset_input_close_callback); apply_low(i->u.obj,i->set_nonblocking_offset,3); pop_stack(); THIS->sleeping=1; } low_start(); pop_n_elems(args-1); } static void pipe_close_input_callback(INT32 args) { struct input *i; i=THIS->firstinput; if(!i) error("Input close callback without inputs!\n"); if(i->type != I_OBJ) error("Premature close callback on pipe!.\n"); if (i->u.obj->prog) { #ifdef BLOCKING_CLOSE apply_low(i->u.obj,i->set_blocking_offset,0); pop_stack(); #endif apply(i->u.obj,"close",0); pop_stack(); } nobjects--; free_object(i->u.obj); i->type=I_NONE; input_finish(); if(args) pop_n_elems(args-1); } static void pipe_version(INT32 args) { pop_n_elems(args); push_string(make_shared_string("PIPE ver 2.0")); } /********** init/exit *******************************************************/ void close_and_free_everything(struct object *thisobj,struct pipe *p) { struct buffer *b; struct input *i; struct output *o; struct object *obj; p->done=1; if (thisobj) thisobj->refs++; /* don't kill object during this */ while (p->firstbuffer) { b=p->firstbuffer; p->firstbuffer=b->next; sbuffers-=b->s->len; nbuffers--; free_string(b->s); b->next=NULL; free((char *)b); /* Hubbe */ } p->lastbuffer=NULL; while (p->firstinput) { i=p->firstinput; p->firstinput=i->next; free_input(i); } p->lastinput=NULL; while (p->firstoutput) { obj=p->firstoutput; o=(struct output *)(obj->storage); p->firstoutput=o->next; output_finish(obj); free_object(obj); } if (p->fd!=-1) { close(p->fd); p->fd=-1; } p->living_outputs=0; if (thisobj) free_object(thisobj); free_svalue(& p->done_callback); free_svalue(& p->output_closed_callback); free_svalue(& p->id); p->done_callback.type=T_INT; p->output_closed_callback.type=T_INT; p->id.type=T_INT; p->done=0; } static void init_pipe_struct(struct object *o) { THIS->firstbuffer=THIS->lastbuffer=NULL; THIS->firstinput=THIS->lastinput=NULL; THIS->firstoutput=NULL; THIS->bytes_in_buffer=0; THIS->pos=0; THIS->sleeping=0; THIS->done=0; THIS->fd=-1; THIS->done_callback.type=T_INT; THIS->output_closed_callback.type=T_INT; THIS->id.type=T_INT; THIS->id.u.integer=0; THIS->living_outputs=0; THIS->sent=0; } static void exit_pipe_struct(struct object *o) { close_and_free_everything(NULL,THIS); } static void exit_output_struct(struct object *obj) { struct output *o; o=(struct output *)(fp->current_storage); if (o->obj) { if(o->obj->prog) { #ifdef BLOCKING_CLOSE apply_low(o->obj,o->set_blocking_offset,0); pop_stack(); #endif push_int(0); apply(o->obj,"set_id",1); pop_stack(); apply(o->obj,"close",0); pop_stack(); if(!THISOBJ->prog) error("Pipe done callback destructed pipe.\n"); } free_object(o->obj); noutputs--; o->obj=0; } } static void init_output_struct(struct object *ob) { struct output *o; o=(struct output *)(fp->current_storage); o->obj=0; } /********** Pike init *******************************************************/ void port_setup_program(void); void f__pipe_debug(INT32 args) { pop_n_elems(args); push_int(noutputs); push_int(ninputs); push_int(nstrings); push_int(nobjects); push_int(mmapped); push_int(nbuffers); push_int(sbuffers); f_aggregate(7); } void pike_module_init(void) { start_new_program(); add_storage(sizeof(struct pipe)); add_efun("_pipe_debug", f__pipe_debug, "function(:array)", 0); add_function("input",pipe_input,"function(object:void)",0); add_function("output",pipe_output,"function(object:void)",0); add_function("write",pipe_write,"function(string:void)",0); add_function("start",pipe_start,"function(:void)",0); add_function("finish",pipe_finish,"function(:void)",0); add_function("set_output_closed_callback",pipe_set_output_closed_callback, "function(void|function(mixed,object:mixed),void|mixed:void)",0); add_function("set_done_callback",pipe_set_done_callback, "function(void|function(mixed:mixed),void|mixed:void)",0); add_function("_output_close_callback",pipe_close_output_callback, "function(int:void)",0); add_function("_input_close_callback",pipe_close_input_callback, "function(int:void)",0); add_function("_output_write_callback",pipe_write_output_callback, "function(int:void)",0); add_function("_input_read_callback",pipe_read_input_callback, "function(int,string:void)",0); add_function("version",pipe_version,"function(:string)",0); add_function("bytes_sent",f_bytes_sent,"function(:int)",0); set_init_callback(init_pipe_struct); set_exit_callback(exit_pipe_struct); pipe_program=end_program(); add_program_constant("pipe",pipe_program, 0); offset_output_close_callback=find_identifier("_output_close_callback", pipe_program); offset_input_close_callback=find_identifier("_input_close_callback", pipe_program); offset_output_write_callback=find_identifier("_output_write_callback", pipe_program); offset_input_read_callback=find_identifier("_input_read_callback", pipe_program); start_new_program(); add_storage(sizeof(struct output)); set_init_callback(init_output_struct); set_exit_callback(exit_output_struct); output_program=end_program(); add_program_constant("__output",output_program, 0); } void pike_module_exit(void) { if(pipe_program) free_program(pipe_program); pipe_program=0; if(output_program) free_program(output_program); output_program=0; }

pike.git/ src/ modules/ Pipe/ pipe.c > f2c730abbad0708ffec1dd52d2b155a95c2212ce [Annotate]