example: add allocations example for benchmarking kernel changes (#26)

extism · Sep 19, 2024 · a83d9eb · a83d9eb
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diff --git a/examples/allocations/Makefile b/examples/allocations/Makefile
@@ -0,0 +1,8 @@
+WASI_SDK_PATH?=../../wasi-sdk
+
+.PHONY: allocations
+allocations:
+	$(WASI_SDK_PATH)/bin/clang -target wasm32-unknown-unknown -nostdlib -Wl,--no-entry -Wl,--export=allocations -O2 -g -o allocations.wasm allocations.c
+
+run: allocations
+	extism call ./allocations.wasm allocations --loop 100 --wasi
diff --git a/examples/allocations/allocations.c b/examples/allocations/allocations.c
@@ -0,0 +1,16 @@
+#define EXTISM_IMPLEMENTATION
+#include "../../extism-pdk.h"
+
+uint64_t count = 0;
+
+int32_t EXTISM_EXPORTED_FUNCTION(allocations) {
+
+  for (int i = 0; i < 10000; i++) {
+    ExtismHandle h = extism_alloc(i + 10);
+    if (i % 3 == 0) {
+      extism_free(h);
+    }
+  }
+
+  return 0;
+}