Enable shared memory && add pthread support (#282)

core/config.h

@@ -86,6 +86,10 @@ enum {
 #define WASM_ENABLE_LIBC_WASI 0
 #endif
 
+#ifndef WASM_ENABLE_LIB_PTHREAD
+#define WASM_ENABLE_LIB_PTHREAD 0
+#endif
+
 #ifndef WASM_ENABLE_BASE_LIB
 #define WASM_ENABLE_BASE_LIB 0
 #endif
@@ -99,6 +103,16 @@ enum {
 #define WASM_ENABLE_BULK_MEMORY 0
 #endif
 
+/* Shared memory */
+#ifndef WASM_ENABLE_SHARED_MEMORY
+#define WASM_ENABLE_SHARED_MEMORY 0
+#endif
+
+/* Thread manager */
+#ifndef WASM_ENABLE_THREAD_MGR
+#define WASM_ENABLE_THREAD_MGR 0
+#endif
+
 /* WASM log system */
 #ifndef WASM_ENABLE_LOG
 #define WASM_ENABLE_LOG 1
@@ -206,5 +220,9 @@ enum {
 #define WASM_ENABLE_SPEC_TEST 0
 #endif
 
+/* Default max thread num per cluster. Can be overwrite by
+    wasm_runtime_set_max_thread_num */
+#define CLUSTER_MAX_THREAD_NUM 4
+
 #endif /* end of _CONFIG_H_ */