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Use a threadsafe private DBEnv for each bsddb compatibility interface

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db that is opened.  DB_THREAD and DB_INIT_LOCK allow for multithreaded
access.  DB_PRIVATE prevents the DBEnv from using the filesystem
(making it only usable by this process; and in this implementation
using one DBEnv per bsddb database)
This commit is contained in:
Gregory P. Smith 2003-09-27 23:00:19 +00:00
parent c8083cf1cc
commit 1eb41e22ab
1 changed files with 10 additions and 3 deletions
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13
Lib/bsddb/__init__.py
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@ -189,7 +189,8 @@ def hashopen(file, flag='c', mode=0666, pgsize=None, ffactor=None, nelem=None,
cachesize=None, lorder=None, hflags=0):
flags = _checkflag(flag)
d = db.DB()
e = _openDBEnv()
d = db.DB(e)
d.set_flags(hflags)
if cachesize is not None: d.set_cachesize(0, cachesize)
if pgsize is not None: d.set_pagesize(pgsize)
@ -206,7 +207,8 @@ def btopen(file, flag='c', mode=0666,
pgsize=None, lorder=None):
flags = _checkflag(flag)
d = db.DB()
e = _openDBEnv()
d = db.DB(e)
if cachesize is not None: d.set_cachesize(0, cachesize)
if pgsize is not None: d.set_pagesize(pgsize)
if lorder is not None: d.set_lorder(lorder)
@ -224,7 +226,8 @@ def rnopen(file, flag='c', mode=0666,
rlen=None, delim=None, source=None, pad=None):
flags = _checkflag(flag)
d = db.DB()
e = _openDBEnv()
d = db.DB(e)
if cachesize is not None: d.set_cachesize(0, cachesize)
if pgsize is not None: d.set_pagesize(pgsize)
if lorder is not None: d.set_lorder(lorder)
@ -238,6 +241,10 @@ def rnopen(file, flag='c', mode=0666,
#----------------------------------------------------------------------
def _openDBEnv():
e = db.DBEnv()
e.open('.', db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD | db.DB_INIT_LOCK | db.DB_INIT_MPOOL)
return e
def _checkflag(flag):
if flag == 'r':