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authorDan Goodliffe <dan@randomdan.homeip.net>2023-04-29 19:07:11 +0100
committerDan Goodliffe <dan@randomdan.homeip.net>2023-04-29 19:07:11 +0100
commit5a0b3927a33807cca4c77c40eb873f8a3b51b0b0 (patch)
tree4af0585ee8f8f468ab10c0a4fe9994fb30b79599 /lib/glRef.h
parentDunno how, but some DOS new lines got in here! (diff)
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Drop .hpp for header only things
Half of them acquired a .cpp part anyway
Diffstat (limited to 'lib/glRef.h')
-rw-r--r--lib/glRef.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/lib/glRef.h b/lib/glRef.h
new file mode 100644
index 0000000..3031cf5
--- /dev/null
+++ b/lib/glRef.h
@@ -0,0 +1,62 @@
+#pragma once
+
+#include <special_members.h>
+#include <stdexcept>
+
+template<typename IdType, auto get, auto release, auto... fixed> class glRef {
+public:
+ // cppcheck-suppress redundantPointerOp
+ template<typename... Args> explicit glRef(Args &&... args) : id {(*get)(fixed..., std::forward<Args>(args)...)}
+ {
+ if (!id) {
+ throw std::runtime_error("Get function failed");
+ }
+ }
+
+ glRef(glRef && other) : id {other.id}
+ {
+ other.id = {};
+ }
+
+ ~glRef()
+ {
+ if (id) {
+ // cppcheck-suppress redundantPointerOp
+ (*release)(id);
+ }
+ }
+
+ NO_COPY(glRef);
+
+ const auto &
+ operator=(glRef && other)
+ {
+ if (id) {
+ // cppcheck-suppress redundantPointerOp
+ (*release)(id);
+ }
+ id = other.id;
+ other.id = {};
+ return *this;
+ }
+
+ auto
+ operator*() const
+ {
+ return id;
+ }
+
+ auto
+ operator->() const
+ {
+ return id;
+ }
+
+ operator IdType() const
+ {
+ return id;
+ }
+
+private:
+ IdType id;
+};