Make db_create work a little more under c++. Addresses #197.

git-svn-id: file:///svn/tokudb@1196 c7de825b-a66e-492c-adef-691d508d4ae1

cxx/Makefile

 CPPFLAGS = -I../include
+CXXFLAGS = -Wall -g
 CC = c++
 LDFLAGS = -lz
+SRCS = $(wildcard *.cpp)
+OBJS = $(patsubst %.cpp, %.o, $(SRCS))
+default: $(OBJS)
+$(OBJS): db_cxx.h
 test1: test1.o dbt.o db.o dbenv.o ../lib/libdb.a
 

cxx/db.cpp

@@ -3,9 +3,11 @@
 #include <errno.h>
 #include "db_cxx.h"
 
-Db::Db(DbEnv *env, u_int32_t flags) {
+Db::Db(DbEnv *env, u_int32_t flags)
+    :      the_Env(env)
+{
     the_db   = 0;
-    the_Env = env;
+
     if (the_Env == 0) {
 	is_private_env = 1;
     }

cxx/db_cxx.h

@@ -69,6 +69,7 @@ class DbEnv {
     DbEnv(u_int32_t flags);
 
     DB_ENV *get_DB_ENV(void) {
+	if (this==0) return 0;
 	return the_env;
     }
 
@@ -86,6 +87,7 @@ class DbTxn {
  public:
     DB_TXN *get_DB_TXN()
 	{
+	    if (this==0) return 0;
 	    return the_txn;
 	}
  private:

cxx/tests/Makefile

 SRCS = $(wildcard *.cpp)
 TARGETS = $(patsubst %.cpp,%,$(SRCS))
 
-DBCXX = ../dbt.o ../db.o ../dbenv.o ../dbt.o
+DBCXX = ../dbt.o ../db.o ../dbenv.o
 CPPFLAGS = -I../ -I../../include
 CXXFLAGS = -Wall -g
 LDFLAGS = -L../lib -ldb
 
 $(TARGETS): $(DBCXX)
 
+$(DBCXX):
+	cd ..;make
 all: $(TARGETS)
 
 clean: