implement DbEnv::set_error_stream closes #255

git-svn-id: file:///svn/tokudb@1603 c7de825b-a66e-492c-adef-691d508d4ae1

cxx/dbenv.cpp

@@ -12,7 +12,7 @@ DbEnv::DbEnv (u_int32_t flags)
 }
 
 DbEnv::DbEnv(DB_ENV *env, u_int32_t flags)
-    : do_no_exceptions((flags&DB_CXX_NO_EXCEPTIONS)!=0)
+    : do_no_exceptions((flags&DB_CXX_NO_EXCEPTIONS)!=0), _error_stream(0)
 {
     the_env = env;
     if (env == 0) {
@@ -126,6 +126,17 @@ void DbEnv::set_errcall(void (*db_errcall_fcn)(const DbEnv *, const char *, cons
     the_env->set_errcall(the_env, toku_db_env_errcall_c);
 }
 
+extern "C" void toku_db_env_error_stream_c(const DB_ENV *dbenv_c, const char *errpfx, const char *msg) {
+    DbEnv *dbenv = (DbEnv *) dbenv_c->api1_internal;
+    if (dbenv->_error_stream)
+        *dbenv->_error_stream << errpfx << ":" << msg << "\n";
+}
+
+void DbEnv::set_error_stream(std::ostream *new_error_stream) {
+    _error_stream = new_error_stream;
+    the_env->set_errcall(the_env, toku_db_env_error_stream_c);
+}
+
 // locking not yet implemented
 
 int DbEnv::set_lk_max_locks(u_int32_t max_locks) {

include/db_cxx.h

 #include <db.h>
+#include <iostream>
 #include <exception>
 #include <string.h>
 #ident "Copyright (c) 2007 Tokutek Inc.  All rights reserved."
@@ -161,6 +162,7 @@ class DbEnv {
     void err(int error, const char *fmt, ...);
     void set_errfile(FILE *errfile);
     void set_errcall(void (*)(const DbEnv *, const char *, const char *));
+    void set_error_stream(std::ostream *);
     int get_flags(u_int32_t *flagsp);
 
     // locking
@@ -178,6 +180,7 @@ class DbEnv {
 // somewhat_private:
     int do_no_exceptions; // This should be private!!!
     void (*errcall)(const DbEnv *, const char *, const char *);
+    std::ostream *_error_stream;
 
  private:
     DB_ENV *the_env;