Add dylib abstraction to isolate platform-specific code

1 files changed, 67 insertions, 0 deletions

diff --git a/src/dylib.c b/src/dylib.c
new file mode 100644
index 0000000..4c6c219
--- /dev/null
+++ b/src/dylib.c
@@ -0,0 +1,67 @@
+// Copyright 2020-2024 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#include "dylib.h"
+
+#ifdef _WIN32
+
+#  include <windows.h>
+
+void*
+dylib_open(const char* const filename, const unsigned flags)
+{
+  (void)flags;
+  return LoadLibrary(filename);
+}
+
+int
+dylib_close(DylibLib* const handle)
+{
+  return !FreeLibrary((HMODULE)handle);
+}
+
+const char*
+dylib_error(void)
+{
+  return "Unknown error";
+}
+
+DylibFunc
+dylib_func(DylibLib* handle, const char* symbol)
+{
+  return (DylibFunc)GetProcAddress((HMODULE)handle, symbol);
+}
+
+#else
+
+#  include <dlfcn.h>
+
+void*
+dylib_open(const char* const filename, const unsigned flags)
+{
+  return dlopen(filename, flags == DYLIB_LAZY ? RTLD_LAZY : RTLD_NOW);
+}
+
+int
+dylib_close(DylibLib* const handle)
+{
+  return dlclose(handle);
+}
+
+const char*
+dylib_error(void)
+{
+  return dlerror();
+}
+
+DylibFunc
+dylib_func(DylibLib* handle, const char* symbol)
+{
+  typedef DylibFunc (*VoidFuncGetter)(void*, const char*);
+
+  VoidFuncGetter dlfunc = (VoidFuncGetter)dlsym;
+
+  return dlfunc(handle, symbol);
+}
+
+#endif