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Diffstat (limited to 'db/include/tcl_db.h')
| -rw-r--r-- | db/include/tcl_db.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/db/include/tcl_db.h b/db/include/tcl_db.h new file mode 100644 index 000000000..254006c2f --- /dev/null +++ b/db/include/tcl_db.h @@ -0,0 +1,219 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1999, 2000 + * Sleepycat Software. All rights reserved. + * + * $Id: tcl_db.h,v 11.9 2000/12/12 17:43:56 bostic Exp $ + */ + +#define MSG_SIZE 100 /* Message size */ + +enum INFOTYPE { + I_ENV, I_DB, I_DBC, I_TXN, I_MP, I_PG, I_LOCK, I_NDBM, I_MUTEX }; + +#define MAX_ID 8 /* Maximum number of sub-id's we need */ + +#define DBTCL_DBM 1 +#define DBTCL_NDBM 2 + +typedef struct _mutex_entry { + union { + struct { + MUTEX real_m; + u_int32_t real_val; + } r; + /* + * This is here to make sure that each of the mutex structures + * are 16-byte aligned, which is required on HP architectures. + * The db_mutex_t structure might be >32 bytes itself, or the + * real_val might push it over the 32 byte boundary. The best + * we can do is use a 48 byte boundary. + */ + char c[48]; + } u; +} _MUTEX_ENTRY; + +#define m u.r.real_m +#define val u.r.real_val + +typedef struct _mutex_data { + DB_ENV *env; + REGINFO reginfo; + _MUTEX_ENTRY *marray; + size_t size; + u_int32_t n_mutex; +} _MUTEX_DATA; + +/* + * Why use a home grown package over the Tcl_Hash functions? + * + * We could have implemented the stuff below without maintaining our + * own list manipulation, efficiently hashing it with the available + * Tcl functions (Tcl_CreateHashEntry, Tcl_GetHashValue, etc). I chose + * not to do so for these reasons: + * + * We still need the information below. Using the hashing only removes + * us from needing the next/prev pointers. We still need the structure + * itself because we need more than one value associated with a widget. + * We need to keep track of parent pointers for sub-widgets (like cursors) + * so we can correctly close. We need to keep track of individual widget's + * id counters for any sub-widgets they may have. We need to be able to + * associate the name/client data outside the scope of the widget. + * + * So, is it better to use the hashing rather than + * the linear list we have now? I decided against it for the simple reason + * that to access the structure would require two calls. The first is + * Tcl_FindHashEntry(table, key) and then, once we have the entry, we'd + * have to do Tcl_GetHashValue(entry) to get the pointer of the structure. + * + * I believe the number of simultaneous DB widgets in existence at one time + * is not going to be that large (more than several dozen) such that + * linearly searching the list is not going to impact performance in a + * noticable way. Should performance be impacted due to the size of the + * info list, then perhaps it is time to revisit this decision. + */ +typedef struct dbtcl_info { + LIST_ENTRY(dbtcl_info) entries; + Tcl_Interp *i_interp; + char *i_name; + enum INFOTYPE i_type; + union infop { + DB_ENV *envp; + void *anyp; + DB *dbp; + DBC *dbcp; + DB_TXN *txnp; + DB_MPOOLFILE *mp; + DB_LOCK *lock; + _MUTEX_DATA *mutex; +#if 0 + DBM *ndbmp; /* Compatibility */ +#endif + } un; + union data { + int anydata; + db_pgno_t pgno; + u_int32_t lockid; + } und; + union data2 { + int anydata; + size_t pagesz; + } und2; + DBT i_lockobj; + FILE *i_err; + char *i_errpfx; + struct dbtcl_info *i_parent; + int i_otherid[MAX_ID]; +} DBTCL_INFO; + +extern int __debug_on, __debug_print, __debug_stop, __debug_test; +LIST_HEAD(infohead, dbtcl_info) __db_infohead; + +#define i_anyp un.anyp +#define i_pagep un.anyp +#define i_envp un.envp +#define i_dbp un.dbp +#define i_dbcp un.dbcp +#define i_txnp un.txnp +#define i_mp un.mp +#define i_lock un.lock +#define i_mutex un.mutex +#if 0 +#define i_ndbm un.ndbmp +#endif + +#define i_data und.anydata +#define i_pgno und.pgno +#define i_locker und.lockid +#define i_data2 und2.anydata +#define i_pgsz und2.pagesz + +#define i_envtxnid i_otherid[0] +#define i_envmpid i_otherid[1] +#define i_envlockid i_otherid[2] +#define i_envmutexid i_otherid[3] + +#define i_mppgid i_otherid[0] + +#define i_dbdbcid i_otherid[0] + +#define NAME_TO_ENV(name) (DB_ENV *)_NameToPtr((name)) +#define NAME_TO_DB(name) (DB *)_NameToPtr((name)) +#define NAME_TO_DBC(name) (DBC *)_NameToPtr((name)) +#define NAME_TO_TXN(name) (DB_TXN *)_NameToPtr((name)) +#define NAME_TO_MP(name) (DB_MPOOLFILE *)_NameToPtr((name)) +#define NAME_TO_LOCK(name) (DB_LOCK *)_NameToPtr((name)) + +/* + * MAKE_STAT_LIST appends a {name value} pair to a result list + * that MUST be called 'res' that is a Tcl_Obj * in the local + * function. This macro also assumes a label "error" to go to + * in the even of a Tcl error. For stat functions this will + * typically go before the "free" function to free the stat structure + * returned by DB. + */ +#define MAKE_STAT_LIST(s,v) \ +do { \ + result = _SetListElemInt(interp, res, (s), (v)); \ + if (result != TCL_OK) \ + goto error; \ +} while (0) + +/* + * MAKE_STAT_STRLIST appends a {name string} pair to a result list + * that MUST be called 'res' that is a Tcl_Obj * in the local + * function. This macro also assumes a label "error" to go to + * in the even of a Tcl error. For stat functions this will + * typically go before the "free" function to free the stat structure + * returned by DB. + */ +#define MAKE_STAT_STRLIST(s,s1) \ +do { \ + result = _SetListElem(interp, res, (s), strlen(s), \ + (s1), strlen(s1)); \ + if (result != TCL_OK) \ + goto error; \ +} while (0) + +/* + * FLAG_CHECK checks that the given flag is not set yet. + * If it is, it sets up an error message. + */ +#define FLAG_CHECK(flag) \ +do { \ + if ((flag) != 0) { \ + Tcl_SetResult(interp, \ + " Only 1 policy can be specified.\n", \ + TCL_STATIC); \ + result = TCL_ERROR; \ + break; \ + } \ +} while (0) + +/* + * FLAG_CHECK2 checks that the given flag is not set yet or is + * only set to the given allowed value. + * If it is, it sets up an error message. + */ +#define FLAG_CHECK2(flag,val) \ +do { \ + if ((flag) != 0 && (flag) != (val)) { \ + Tcl_SetResult(interp, \ + " Only 1 policy can be specified.\n", \ + TCL_STATIC); \ + result = TCL_ERROR; \ + break; \ + } \ +} while (0) + +/* + * IS_HELP checks whether the arg we bombed on is -?, which is a help option. + * If it is, we return TCL_OK (but leave the result set to whatever + * Tcl_GetIndexFromObj says, which lists all the valid options. Otherwise + * return TCL_ERROR. + */ +#define IS_HELP(s) \ + (strcmp(Tcl_GetStringFromObj(s,NULL), "-?") == 0) ? TCL_OK : TCL_ERROR + +#include "tcl_ext.h" |