New beos files. FAQ cleanup.
This commit is contained in:
Bruce Momjian
parent
949529481e
commit
a759460178
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@ -950,7 +950,7 @@ Guttman, A. "R-trees: A Dynamic Index Structure for Spatial Searching."
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Proc of the 1984 ACM SIGMOD Int'l Conf on Mgmt of Data, 45-57.<P>
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You can also find this paper in Stonebraker's "Readings in Database
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Systems"<P>
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Systems".<P>
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Built-in R-trees can handle polygons and boxes. In theory, R-trees can
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be extended to handle higher number of dimensions. In practice,
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/begin.sgml,v 1.11 2000/03/27 17:14:42 thomas Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/begin.sgml,v 1.12 2000/10/07 14:16:01 momjian Exp $
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Postgres documentation
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-->
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@ -103,7 +103,7 @@ NOTICE: BEGIN: already a transaction in progress
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and a commit is implicitly performed at the end of the statement
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(if execution was successful, otherwise a rollback is done).
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<command>BEGIN</command> initiates a user transaction in chained mode,
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i.e. all user statements after <command>BEGIN</command> command will
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i.e., all user statements after <command>BEGIN</command> command will
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be executed in a single transaction until an explicit
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<xref linkend="sql-commit-title" endterm="sql-commit-title">,
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<xref linkend="sql-rollback-title" endterm="sql-rollback-title">,
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@ -0,0 +1,31 @@
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#-------------------------------------------------------------------------
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#
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# Makefile--
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# Makefile for port/beos
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#
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#-------------------------------------------------------------------------
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top_builddir = ../../../..
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include ../../../Makefile.global
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INCLUDE_OPT =
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CFLAGS+=$(INCLUDE_OPT)
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OBJS = sem.o shm.o support.o
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all: SUBSYS.o
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SUBSYS.o: $(OBJS)
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$(LD) $(LDREL) $(LDOUT) SUBSYS.o $(OBJS)
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depend dep:
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$(CC) -MM $(INCLUDE_OPT) *.c >depend
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clean:
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rm -f SUBSYS.o $(OBJS)
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ifeq (depend,$(wildcard depend))
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include depend
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endif
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@ -0,0 +1,224 @@
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/*-------------------------------------------------------------------------
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*
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* sem.c
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* BeOS System V Semaphores Emulation
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*
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* Copyright (c) 1999-2000, Cyril VELTER
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "stdio.h"
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#include "errno.h"
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#include "OS.h"
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// Controle d'un pool de sémaphores
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// On considere que le semId utilisé correspond bien a une area de notre adress space
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// Les informations du pool de sémaphore sont stockés dans cette area
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int semctl(int semId,int semNum,int flag,union semun semun)
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{
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// Recherche de l'adresse de base de l'area
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int32* Address;
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area_info info;
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// printf("semctl : semid %d, semnum %d, cmd %d\n",semId,semNum,flag);
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if (get_area_info(semId,&info)!=B_OK)
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{
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// printf("area not found\n");
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errno=EINVAL;
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return -1;
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}
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Address=(int32*)info.address;
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// semnum peut etre égal à 0
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// semun.array contient la valeur de départ du sémaphore
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// si flag = set_all il faut définir la valeur du sémaphore sue semun.array
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if (flag==SETALL)
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{
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long i;
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// printf("setall %d\n",Address[0]);
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for (i=0;i<Address[0];i++)
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{
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int32 cnt;
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get_sem_count(Address[i+1],&cnt);
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// printf("Set de ALl %d %d = %d\n",Address[i+1],semun.array[i],cnt);
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cnt-=semun.array[i];
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if (cnt > 0)
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acquire_sem_etc(Address[i+1],cnt,0,0);
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if (cnt < 0)
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release_sem_etc(Address[i+1],-cnt,0);
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}
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return 1;
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}
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/* si flag = SET_VAL il faut définir la valeur du sémaphore sur semun.val*/
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if (flag==SETVAL)
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{
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int32 cnt;
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get_sem_count(Address[semNum+1],&cnt);
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// printf("semctl set val id : %d val : %d = %d\n",semId,semun.val,cnt);
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cnt-=semun.val;
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if (cnt > 0)
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acquire_sem_etc(Address[semNum+1],cnt,0,0);
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if (cnt < 0)
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release_sem_etc(Address[semNum+1],-cnt,0);
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return 1;
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}
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/* si flag=rm_id il faut supprimer le sémaphore*/
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if (flag==IPC_RMID)
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{
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long i;
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// Suppression des sémaphores (ils appartienent au kernel maintenant)
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thread_info ti;
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// printf("remove set\n");
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get_thread_info(find_thread(NULL),&ti);
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for (i=0;i<Address[0];i++)
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{
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set_sem_owner(Address[i+1],ti.team);
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delete_sem(Address[i+1]);
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}
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// Il faudrait supprimer en boucle toutes les area portant le même nom
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delete_area(semId);
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return 1;
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}
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/* si flag = GETNCNT il faut renvoyer le semaphore count*/
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if (flag==GETNCNT)
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{
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// printf("getncnt : impossible sur BeOS\n");
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return 0; // a faire (peut etre impossible sur Beos)
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}
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/* si flag = GETVAL il faut renvoyer la valeur du sémaphore*/
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if (flag==GETVAL)
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{
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int32 cnt;
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get_sem_count(Address[semNum+1],&cnt);
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// printf("semctl getval id : %d cnt : %d\n",semId,cnt);
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return cnt;
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}
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// printf("semctl erreur\n");
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return 0;
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}
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// L'area dans laquelle est stockée le pool est identifiée par son nom (convention à moi : SYSV_IPC_SEM : "semId)
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int semget(int semKey, int semNum, int flags)
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{
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char Nom[50];
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area_id parea;
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void* Address;
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// printf("semget get k: %d n: %d fl:%d\n",semKey,semNum,flags);
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// Construction du nom que doit avoir l'area
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sprintf(Nom,"SYSV_IPC_SEM : %d",semKey);
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// Recherche de l'area
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parea=find_area(Nom);
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// L'area existe
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if (parea!=B_NAME_NOT_FOUND)
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{
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// printf("area found\n");
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// On demande une creatrion d'un pool existant : erreur
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if ((flags&IPC_CREAT)&&(flags&IPC_EXCL))
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{
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// printf("creat asking exist\n");
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errno=EEXIST;
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return -1;
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}
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// Clone de l'area et renvoi de son ID
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parea=clone_area(Nom,&Address,B_ANY_ADDRESS,B_READ_AREA | B_WRITE_AREA,parea);
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return parea;
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}
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// L'area n'existe pas
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else
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{
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// printf("set don't exist\n");
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// Demande de creation
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if (flags&IPC_CREAT)
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{
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int32* Address;
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thread_info ti;
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void* Ad;
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long i;
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// printf("create set\n");
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// On ne peut pas creer plus de 500 semaphores dans un pool (limite tout à fait arbitraire de ma part)
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if (semNum>500)
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{
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errno=ENOSPC;
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return -1;
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}
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// Creation de la zone de mémoire partagée
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parea=create_area(Nom,&Ad,B_ANY_ADDRESS,4096,B_NO_LOCK,B_READ_AREA | B_WRITE_AREA);
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if ((parea==B_BAD_VALUE)|| (parea==B_NO_MEMORY)||(parea==B_ERROR))
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{
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errno=ENOMEM;
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return -1;
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}
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Address=(int32*)Ad;
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Address[0]=semNum;
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for (i=1;i<=Address[0];i++)
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{
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// Creation des sémaphores 1 par 1
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Address[i]=create_sem(0,Nom);
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if ((Address[i]==B_BAD_VALUE)|| (Address[i]==B_NO_MEMORY)||(Address[i]==B_NO_MORE_SEMS))
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{
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errno=ENOMEM;
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return -1;
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}
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}
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// printf("returned %d\n",parea);
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return parea;
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}
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// Le pool n'existe pas et pas de demande de création
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else
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{
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// printf("set does not exist no creat requested\n");
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errno=ENOENT;
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return -1;
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}
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}
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}
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// Opération sur le pool de sémaphores
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int semop(int semId, struct sembuf *sops, int nsops)
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{
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// Recherche de l'adresse du pool
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int32* Address;
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area_info info;
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long i;
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// printf("semop id : %d n: %d\n",semId,sops->sem_op);
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get_area_info(semId,&info);
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Address=(int32*)info.address;
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if ((semId==B_BAD_VALUE)||(semId==B_NO_MEMORY)||(semId==B_ERROR))
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{
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errno=EINVAL;
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return -1;
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}
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// Execution de l'action
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for(i=0;i<nsops;i++)
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{
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// printf("semid %d, n %d\n",Address[sops[i].sem_num+1],sops[i].sem_op);
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if (sops[i].sem_op < 0)
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{
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acquire_sem_etc(Address[sops[i].sem_num+1],-sops[i].sem_op,0,0);
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}
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if (sops[i].sem_op > 0)
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{
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release_sem_etc(Address[sops[i].sem_num+1],sops[i].sem_op,0);
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}
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}
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return 0;
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}
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@ -0,0 +1,112 @@
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/*-------------------------------------------------------------------------
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*
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* shm.c
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* BeOS System V Shared Memory Emulation
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*
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* Copyright (c) 1999-2000, Cyril VELTER
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "stdio.h"
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#include "OS.h"
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// Detachement d'une zone de mémoire partagée
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// On detruit le clone de l'area dans notre adress-space
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int shmdt(char* shmaddr)
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{
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// Recherche de l'id de l'area présente à cette adresse
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area_id s;
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s=area_for(shmaddr);
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// printf("detach area %d\n",s);
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// Suppression de l'area
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return delete_area(s);
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}
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// Attachement à une zone de mémoire partagée
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// L'area doit bien partie de notre adress-space et on retourne directement l'adress
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int* shmat(int memId,int m1,int m2)
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{
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// printf("shmat %d %d %d\n",memId,m1,m2);
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// Lecture de notre team_id
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thread_info thinfo;
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team_info teinfo;
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area_info ainfo;
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get_thread_info(find_thread(NULL),&thinfo);
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get_team_info(thinfo.team,&teinfo);
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// Lecture du teamid de l'area
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if (get_area_info(memId,&ainfo)!=B_OK)
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printf("AREA %d Invalide\n",memId);
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if (ainfo.team==teinfo.team)
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{
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//retour de l'adresse
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// printf("attach area %d add %d\n",memId,ainfo.address);
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return (int*)ainfo.address;
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}
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else
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{
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// Clone de l'area
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area_id narea;
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narea = clone_area(ainfo.name,&(ainfo.address),B_CLONE_ADDRESS,B_READ_AREA | B_WRITE_AREA,memId);
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get_area_info(narea,&ainfo);
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// printf("attach area %d in %d add %d\n",memId,narea,ainfo.address);
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return (int*)ainfo.address;
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}
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}
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// Utilisé uniquement pour supprimer une zone de mémoire partagée
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// On fait la meme chose que le detach mais avec un id direct
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int shmctl(int shmid,int flag, struct shmid_ds* dummy)
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{
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// printf("shmctl %d %d \n",shmid,flag);
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delete_area(shmid);
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return 0;
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}
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// Recupération d'une area en fonction de sa référence
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// L'area source est identifiée par son nom (convention à moi : SYSV_IPC_SHM : "memId)
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int shmget(int memKey,int size,int flag)
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{
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int32 n_size;
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char nom[50];
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area_id parea;
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void* Address;
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area_id a;
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n_size=((size/4096)+1)*4096;
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// printf("shmget %d %d %d %d\n",memKey,size,flag,nsize);
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// Determination du nom que doit avoir l'area
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sprintf(nom,"SYSV_IPC_SHM : %d",memKey);
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// Recherche de cette area
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parea=find_area(nom);
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// L'area existe
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if (parea!=B_NAME_NOT_FOUND)
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{
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// printf("area found\n");
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return parea;
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}
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// L'area n'existe pas et on n'en demande pas la création : erreur
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if (flag==0)
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{
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// printf("area %s not found\n",nom);
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return -1;
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}
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// L'area n'existe pas mais on demande sa création
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a=create_area(nom,&Address,B_ANY_ADDRESS,n_size,B_NO_LOCK,B_READ_AREA | B_WRITE_AREA);
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// printf("area %s : %d created addresse %d\n",nom,a,Address);
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return a;
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}
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@ -0,0 +1,258 @@
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/*-------------------------------------------------------------------------
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*
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* support.c
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* BeOS Support functions
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*
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* Copyright (c) 1999-2000, Cyril VELTER
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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/* Support Globals */
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char* self_binary=NULL;
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port_id beos_dl_port_in=0;
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port_id beos_dl_port_out=0;
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sem_id beos_shm_sem;
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image_id beos_dl_open(char * filename)
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{
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image_id im;
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/* Start the support server */
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if (self_binary==NULL)
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{
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/* Can't start support server without binary name */
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elog(NOTICE, "Error loading BeOS support server : can't find binary");
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return B_ERROR;
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}
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else
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{
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/* If a port doesn't exist, lauch support server */
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if ((beos_dl_port_in<=0)||(beos_dl_port_out<=0))
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{
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/* Create communication port */
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beos_dl_port_in=create_port(50,"beos_support_in");
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beos_dl_port_out=create_port(50,"beos_support_in");
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if ((beos_dl_port_in<=0)||(beos_dl_port_out<=0))
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{
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elog(NOTICE, "Error loading BeOS support server : can't create communication ports");
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return B_ERROR;
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}
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else
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{
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char Cmd[4000];
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/* Build arg list */
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sprintf(Cmd,"%s -beossupportserver %d %d &",self_binary,(int)beos_dl_port_in,(int)beos_dl_port_out);
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/* Lauch process */
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system(Cmd);
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}
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}
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}
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/* Add-on loading */
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/* Send command '1' (load) to the support server */
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write_port(beos_dl_port_in,1,filename,strlen(filename)+1);
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/* Read Object Id */
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read_port(beos_dl_port_out,&im,NULL,0);
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/* Checking integrity */
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if (im<0)
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{
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elog(NOTICE, "Can't load this add-on ");
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return B_ERROR;
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}
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else
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{
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/* Map text and data segment in our address space */
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char datas[4000];
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int32 area;
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int32 resu;
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void* add;
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/* read text segment id and address */
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read_port(beos_dl_port_out,&area,datas,4000);
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read_port(beos_dl_port_out,(void*)&add,datas,4000);
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/* map text segment in our address space */
|
||||
resu=clone_area(datas,&add,B_EXACT_ADDRESS,B_READ_AREA|B_WRITE_AREA,area);
|
||||
if (resu<0)
|
||||
{
|
||||
/* If we can't map, we are in reload case */
|
||||
/* delete the mapping */
|
||||
resu=delete_area(area_for(add));
|
||||
/* Remap */
|
||||
resu=clone_area(datas,&add,B_EXACT_ADDRESS,B_READ_AREA|B_WRITE_AREA,area);
|
||||
if (resu<0)
|
||||
{
|
||||
elog(NOTICE, "Can't load this add-on : map text error");
|
||||
}
|
||||
}
|
||||
|
||||
/* read text segment id and address */
|
||||
read_port(beos_dl_port_out,&area,datas,4000);
|
||||
read_port(beos_dl_port_out,(void*)&add,datas,4000);
|
||||
/* map text segment in our address space */
|
||||
resu=clone_area(datas,&add,B_EXACT_ADDRESS,B_READ_AREA|B_WRITE_AREA,area);
|
||||
if (resu<0)
|
||||
{
|
||||
/* If we can't map, we are in reload case */
|
||||
/* delete the mapping */
|
||||
resu=delete_area(area_for(add));
|
||||
/* Remap */
|
||||
resu=clone_area(datas,&add,B_EXACT_ADDRESS,B_READ_AREA|B_WRITE_AREA,area);
|
||||
if (resu<0)
|
||||
{
|
||||
elog(NOTICE, "Can't load this add-on : map data error");
|
||||
}
|
||||
}
|
||||
|
||||
return im;
|
||||
}
|
||||
}
|
||||
|
||||
status_t beos_dl_close(image_id im)
|
||||
{
|
||||
/* unload add-on */
|
||||
int32 resu;
|
||||
write_port(beos_dl_port_in,2,&im,4);
|
||||
read_port(beos_dl_port_out,&resu,NULL,0);
|
||||
return resu;
|
||||
}
|
||||
|
||||
/* Main support server loop */
|
||||
|
||||
void beos_startup(int argc,char** argv)
|
||||
{
|
||||
if (strlen(argv[0]) >= 10 && !strcmp(argv[0] + strlen(argv[0]) - 10, "postmaster"))
|
||||
{
|
||||
/* Shared memory cloning protection semaphore */
|
||||
beos_shm_sem=create_sem(1,"beos_shm_sem");
|
||||
}
|
||||
|
||||
if (argc > 1 && strcmp(argv[1], "-beossupportserver") == 0)
|
||||
{
|
||||
port_id port_in;
|
||||
port_id port_out;
|
||||
|
||||
/* Get back port ids from arglist */
|
||||
sscanf(argv[2],"%d",(int*)(&port_in));
|
||||
sscanf(argv[3],"%d",(int*)(&port_out));
|
||||
|
||||
/* Main server loop */
|
||||
for (;;)
|
||||
{
|
||||
int32 opcode=0;
|
||||
char datas[4000];
|
||||
|
||||
/* Wait for a message from the backend :
|
||||
1 : load a shared object
|
||||
2 : unload a shared object
|
||||
any other : exit support server */
|
||||
read_port(port_in,&opcode,datas,4000);
|
||||
|
||||
switch(opcode)
|
||||
{
|
||||
image_id addon;
|
||||
image_info info_im;
|
||||
area_info info_ar;
|
||||
|
||||
/* Load Add-On */
|
||||
case 1 :
|
||||
|
||||
/* Load shared object */
|
||||
addon=load_add_on(datas);
|
||||
|
||||
/* send back the shared object Id */
|
||||
write_port(port_out,addon,NULL,0);
|
||||
|
||||
/* Get Shared Object infos */
|
||||
get_image_info(addon,&info_im);
|
||||
|
||||
/* get text segment info */
|
||||
get_area_info(area_for(info_im.text),&info_ar);
|
||||
/* Send back area_id of text segment */
|
||||
write_port(port_out,info_ar.area,info_ar.name,strlen(info_ar.name)+1);
|
||||
/* Send back real address of text segment */
|
||||
write_port(port_out,(int)info_ar.address,info_ar.name,strlen(info_ar.name)+1);
|
||||
|
||||
|
||||
/* get data segment info */
|
||||
get_area_info(area_for(info_im.data),&info_ar);
|
||||
/* Send back area_id of data segment */
|
||||
write_port(port_out,info_ar.area,info_ar.name,strlen(info_ar.name)+1);
|
||||
/* Send back real address of data segment */
|
||||
write_port(port_out,(int)info_ar.address,info_ar.name,strlen(info_ar.name)+1);
|
||||
break;
|
||||
/* UnLoad Add-On */
|
||||
case 2 :
|
||||
/* Unload shared object and send back the result of the operation */
|
||||
write_port(port_out,unload_add_on(*((int*)(datas))),NULL,0);
|
||||
break;
|
||||
/* Cleanup and exit */
|
||||
default:
|
||||
/* Free system resources */
|
||||
delete_port(port_in);
|
||||
delete_port(port_out);
|
||||
/* Exit */
|
||||
exit(0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* Never be there */
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void beos_backend_startup(char * binary)
|
||||
{
|
||||
team_id ct;
|
||||
thread_info inft;
|
||||
char nom[50];
|
||||
char nvnom[50];
|
||||
area_info inf;
|
||||
int32 cook=0;
|
||||
|
||||
/* remember full path binary name to load dl*/
|
||||
self_binary=strdup(binary);
|
||||
|
||||
/* find the current team */
|
||||
get_thread_info(find_thread(NULL),&inft);
|
||||
ct=inft.team;
|
||||
|
||||
/* find all area with a name begining by pgsql and destroy / clone then */
|
||||
|
||||
/* This operation must be done by only one backend at a time */
|
||||
if(acquire_sem(beos_shm_sem)==B_OK)
|
||||
{
|
||||
while (get_next_area_info(0, &cook, &inf) == B_OK)
|
||||
{
|
||||
strcpy(nom,inf.name);
|
||||
strcpy(nvnom,inf.name);
|
||||
nom[9]=0;
|
||||
nvnom[5]='i';
|
||||
if (!strcmp(nom,"SYSV_IPC_"))
|
||||
{
|
||||
void* add;
|
||||
area_id ar;
|
||||
add=inf.address;
|
||||
delete_area(inf.area);
|
||||
ar=find_area(inf.name);
|
||||
clone_area(nvnom,&add,B_CLONE_ADDRESS,B_READ_AREA|B_WRITE_AREA,ar);
|
||||
}
|
||||
}
|
||||
release_sem(beos_shm_sem);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Fatal error, exiting with error */
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue