Don't call memory.deallocate for NULL memory (#59)

Also:
- Latest `toolshed:ts22.4.3` -> `22.4.10` : gcc 11.3 -> 12.3
- Disable some new clang-tidies

.clang-tidy

@@ -22,6 +22,10 @@ Checks: >-
   -hicpp-static-assert,
   -misc-static-assert,
   -modernize-macro-to-enum,
+  -cppcoreguidelines-macro-to-enum,
+  -bugprone-casting-through-void,
+  -misc-include-cleaner,
+  -cppcoreguidelines-avoid-do-while,
 CheckOptions:
   - key:   readability-function-cognitive-complexity.Threshold
     value: '99'

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
   debug:
     if: github.event_name == 'push'
     runs-on: ubuntu-latest
-    container: ghcr.io/opencyphal/toolshed:ts22.4.3
+    container: ghcr.io/opencyphal/toolshed:ts22.4.10
     strategy:
       matrix:
         toolchain: [ 'clang', 'gcc' ]
@@ -46,7 +46,7 @@ jobs:
   optimizations:
     if: github.event_name == 'push'
     runs-on: ubuntu-latest
-    container: ghcr.io/opencyphal/toolshed:ts22.4.3
+    container: ghcr.io/opencyphal/toolshed:ts22.4.10
     strategy:
       matrix:
         toolchain: [ 'clang', 'gcc' ]
@@ -55,7 +55,7 @@ jobs:
           - toolchain: gcc
             c-compiler: gcc
             cxx-compiler: g++
-            cxx-flags: -fno-strict-aliasing  # GCC in MinSizeRel C++20 mode misoptimizes the Cavl test.
+            cxx-flags: -fno-strict-aliasing # GCC in MinSizeRel C++20 mode misoptimizes the Cavl test.
           - toolchain: clang
             c-compiler: clang
             cxx-compiler: clang++
@@ -123,7 +123,7 @@ jobs:
 
   sonar:
     runs-on: ubuntu-latest
-    container: ghcr.io/opencyphal/toolshed:ts22.4.3
+    container: ghcr.io/opencyphal/toolshed:ts22.4.10
     if: >
       (
         (github.event_name == 'pull_request' || contains(github.ref, '/main') || contains(github.ref, '/release')) &&

libudpard/udpard.c

@@ -140,7 +140,10 @@ static inline void memFree(const struct UdpardMemoryResource memory, const size_
 static inline void memFreePayload(const struct UdpardMemoryDeleter memory, const struct UdpardMutablePayload payload)
 {
     UDPARD_ASSERT(memory.deallocate != NULL);
-    memory.deallocate(memory.user_reference, payload.size, payload.data);
+    if (payload.data != NULL)
+    {
+        memory.deallocate(memory.user_reference, payload.size, payload.data);
+    }
 }
 
 static inline void memZero(const size_t size, void* const data)
@@ -1081,13 +1084,18 @@ static inline bool rxSlotEject(size_t* const                out_payload_size,
     {
         result            = true;
         *out_payload_size = eject_ctx.retain_size;
-        *out_payload_head = (eject_ctx.head != NULL)
-                                ? (*eject_ctx.head)  // Slice off the derived type fields as they are not needed.
-                                : (struct UdpardFragment){.next = NULL, .view = {0, NULL}, .origin = {0, NULL}};
-        // This is the single-frame transfer optimization suggested by Scott: we free the first fragment handle
-        // early by moving the contents into the rx_transfer structure by value.
-        // No need to free the payload buffer because it has been transferred to the transfer.
-        memFree(memory.fragment, sizeof(RxFragment), eject_ctx.head);  // May be empty.
+        if (eject_ctx.head != NULL)
+        {
+            // This is the single-frame transfer optimization suggested by Scott: we free the first fragment handle
+            // early by moving the contents into the rx_transfer structure by value.
+            // No need to free the payload buffer because it has been transferred to the transfer.
+            *out_payload_head = *eject_ctx.head;  // Slice off the derived type fields as they are not needed.
+            memFree(memory.fragment, sizeof(RxFragment), eject_ctx.head);
+        }
+        else
+        {
+            *out_payload_head = (struct UdpardFragment){.next = NULL, .view = {0, NULL}, .origin = {0, NULL}};
+        }
     }
     else  // The transfer turned out to be invalid. We have to free the fragments. Can't use the tree anymore.
     {

tests/.clang-tidy

@@ -41,6 +41,9 @@ Checks: >-
   -modernize-macro-to-enum,
   -modernize-use-trailing-return-type,
   -cppcoreguidelines-owning-memory,
+  -misc-include-cleaner,
+  -performance-avoid-endl,
+  -cppcoreguidelines-avoid-do-while,
 WarningsAsErrors: '*'
 HeaderFilterRegex: '.*\.hpp'
 FormatStyle: file