Class: Jlog

Inherits:
Object
  • Object
show all
Defined in:
lib/jlog.rb,
lib/jlog/version.rb,
ext/jlog/jlog.c

Direct Known Subclasses

Reader, Writer

Defined Under Namespace

Classes: Error, Reader, Writer

Constant Summary collapse

VERSION = 
"0.1.0"

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/jlog/jlog.c', line 58

VALUE rJlog_initialize(int argc, VALUE* argv, VALUE klass) 
{
   int options;
   Jlog jo;
   jlog_id zeroed = {0,0};
   VALUE path;
   VALUE optarg;
   VALUE size;

   rb_scan_args(argc, argv, "12", &path, &optarg, &size);

   if(NIL_P(optarg)) {
      options = O_CREAT;
   } else {
      options = (int)NUM2INT(optarg);
   }

   if(NIL_P(size)) {
      size = (size_t)INT2FIX(0);
   }

   Data_Get_Struct(klass, jlog_obj, jo);

   jo->ctx = jlog_new(StringValuePtr(path));
   jo->path = strdup(StringValuePtr(path));
   jo->auto_checkpoint = 0;
   jo->start = zeroed;
   jo->prev = zeroed;
   jo->last = zeroed;
   jo->end = zeroed;


   if(!jo->ctx) {
      rJlog_free(jo);
      rb_raise(eJlog, "jlog_new(%s) failed", StringValuePtr(path));
   }

   if(options & O_CREAT) {
      if(jlog_ctx_init(jo->ctx) != 0) {
         if(jlog_ctx_err(jo->ctx) == JLOG_ERR_CREATE_EXISTS) {
            if(options & O_EXCL) {
               rJlog_free(jo);
               rb_raise(eJlog, "file already exists: %s", StringValuePtr(path));
            }
         }else {
            rJlog_raise(jo, "Error initializing jlog");
         }
      }
      jlog_ctx_close(jo->ctx);
      jo->ctx = jlog_new(StringValuePtr(path));
      if(!jo->ctx) {
         rJlog_free(jo);
         rb_raise(eJlog, "jlog_new(%s) failed after successful init", StringValuePtr(path));
      }
      rJlog_populate_subscribers(klass);
   } 

   if(!jo) { 
      rb_raise(eJlog, "jo wasn't initialized.");
   }

   return klass;
}

Instance Method Details

#add_subscriber(*args) ⇒ Object 



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# File 'ext/jlog/jlog.c', line 129

VALUE rJlog_add_subscriber(int argc, VALUE* argv, VALUE self)
{
   VALUE s;
   VALUE w;
   unsigned int whence;
   Jlog jo;

   rb_scan_args(argc, argv, "11", &s, &w);

   if(NIL_P(w)) {
      whence = 0;
   } else {
      whence = NUM2UINT(w);
   }

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx || jlog_ctx_add_subscriber(jo->ctx, StringValuePtr(s), whence) != 0) {
      return Qfalse;
   }

   rJlog_populate_subscribers(self);

   return Qtrue;
}

#close ⇒ Object 



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# File 'ext/jlog/jlog.c', line 227

VALUE rJlog_close(VALUE self)
{
   Jlog jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx) return Qnil;

   jlog_ctx_close(jo->ctx);
   jo->ctx = NULL;

   return Qtrue;
}

#destroy ⇒ Object 



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# File 'ext/jlog/jlog.c', line 254

VALUE rJlog_destroy(VALUE self)
{
   Jlog jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo) return Qnil;

   rJlog_free(jo);

   return Qtrue;
}

#inspect ⇒ Object 



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# File 'ext/jlog/jlog.c', line 241

VALUE rJlog_inspect(VALUE self)
{
   Jlog jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx) return Qnil;

   // XXX Fill in inspect call data 

   return Qtrue;
}

#list_subscribers ⇒ Object 



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# File 'ext/jlog/jlog.c', line 196

VALUE rJlog_list_subscribers(VALUE self)
{
   Jlog jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx)
   {
      rb_raise(eJlog, "Invalid jlog context");
   }

   rJlog_populate_subscribers(self);

   return rb_iv_get(self, "@subscribers");
}

#raw_size ⇒ Object Also known as: size 



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# File 'ext/jlog/jlog.c', line 212

VALUE rJlog_raw_size(VALUE self)
{
   size_t size;
   Jlog jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx) {
      rb_raise(eJlog, "Invalid jlog context");
   }
   size = jlog_raw_size(jo->ctx);

   return INT2NUM(size);
}

#remove_subscriber(subscriber) ⇒ Object 



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# File 'ext/jlog/jlog.c', line 156

VALUE rJlog_remove_subscriber(VALUE self, VALUE subscriber)
{
   Jlog jo;
   int res;

   Data_Get_Struct(self, jlog_obj, jo);
   res = jlog_ctx_remove_subscriber(jo->ctx, StringValuePtr(subscriber));
   if(!jo || !jo->ctx || res != 0)
   {
      return res;
   }

   rJlog_populate_subscribers(self);

   return Qtrue;
}