Add SerdWorld for shared library state

1 files changed, 46 insertions, 26 deletions

diff --git a/serd/serd.h b/serd/serd.h
index 4e9b5d48..715ff22a 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -56,6 +56,13 @@ extern "C" {
 */
 
 /**
+   World.
+
+   The World represents all library state shared between various objects.
+*/
+typedef struct SerdWorldImpl SerdWorld;
+
+/**
    Environment.
 
    Represents the state required to resolve a CURIE or relative URI, e.g. the
@@ -695,6 +702,41 @@ typedef struct SerdSinkInterface {
 
 /**
    @}
+   @name World
+   @{
+*/
+
+/**
+   Create a new Serd World.
+
+   It is safe to use multiple worlds in one process, though no objects can be
+   shared between worlds.
+*/
+SERD_API
+SerdWorld*
+serd_world_new(void);
+
+/**
+   Free `world`.
+*/
+SERD_API
+void
+serd_world_free(SerdWorld* world);
+
+/**
+   Set a function to be called when errors occur.
+
+   The `error_sink` will be called with `handle` as its first argument.  If
+   no error function is set, errors are printed to stderr.
+*/
+SERD_API
+void
+serd_world_set_error_sink(SerdWorld*    world,
+                          SerdErrorSink error_sink,
+                          void*         handle);
+
+/**
+   @}
    @name Environment
    @{
 */
@@ -800,7 +842,8 @@ serd_env_foreach(const SerdEnv* env,
 */
 SERD_API
 SerdReader*
-serd_reader_new(SerdSyntax               syntax,
+serd_reader_new(SerdWorld*               world,
+                SerdSyntax               syntax,
                 const SerdSinkInterface* sink);
 
 /**
@@ -815,18 +858,6 @@ void
 serd_reader_set_strict(SerdReader* reader, bool strict);
 
 /**
-   Set a function to be called when errors occur during reading.
-
-   The `error_sink` will be called with `handle` as its first argument.  If
-   no error function is set, errors are printed to stderr in GCC style.
-*/
-SERD_API
-void
-serd_reader_set_error_sink(SerdReader*   reader,
-                           SerdErrorSink error_sink,
-                           void*         error_handle);
-
-/**
    Return the `handle` passed to serd_reader_new().
 */
 SERD_API
@@ -944,7 +975,8 @@ serd_reader_free(SerdReader* reader);
 */
 SERD_API
 SerdWriter*
-serd_writer_new(SerdSyntax     syntax,
+serd_writer_new(SerdWorld*     world,
+                SerdSyntax     syntax,
                 SerdStyle      style,
                 SerdEnv*       env,
                 const SerdURI* base_uri,
@@ -1005,18 +1037,6 @@ char*
 serd_buffer_sink_finish(SerdBuffer* stream);
 
 /**
-   Set a function to be called when errors occur during writing.
-
-   The `error_sink` will be called with `handle` as its first argument.  If
-   no error function is set, errors are printed to stderr.
-*/
-SERD_API
-void
-serd_writer_set_error_sink(SerdWriter*   writer,
-                           SerdErrorSink error_sink,
-                           void*         error_handle);
-
-/**
    Set a prefix to be removed from matching blank node identifiers.
 */
 SERD_API