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

samples/multi-thread/wasm-apps/CMakeLists.txt

@@ -0,0 +1,34 @@
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+cmake_minimum_required(VERSION 2.8)
+project(wasm-apps)
+
+set(WAMR_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../..)
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR wasm32)
+set (CMAKE_SYSROOT                  ${WAMR_ROOT_DIR}/wamr-sdk/app/libc-builtin-sysroot)
+
+if (NOT DEFINED WASI_SDK_DIR)
+    set (WASI_SDK_DIR               "/opt/wasi-sdk")
+endif ()
+
+set (CMAKE_C_FLAGS                  "-nostdlib -pthread -Qunused-arguments")
+set (CMAKE_C_FLAGS                  "${CMAKE_C_FLAGS} -z stack-size=32768")
+set (CMAKE_C_COMPILER_TARGET        "wasm32")
+set (CMAKE_C_COMPILER               "${WASI_SDK_DIR}/bin/clang")
+
+set (DEFINED_SYMBOLS
+"${WAMR_ROOT_DIR}/wamr-sdk/app/libc-builtin-sysroot/share/defined-symbols.txt")
+
+set (CMAKE_EXE_LINKER_FLAGS
+    "-Wl,--shared-memory,--max-memory=131072,       \
+    -Wl,--no-entry,--strip-all,--export=main,       \
+    -Wl,--export=__heap_base,--export=__data_end    \
+    -Wl,--export=__wasm_call_ctors  \
+    -Wl,--allow-undefined-file=${DEFINED_SYMBOLS}"
+)
+
+add_executable(test.wasm  main.c)
+target_link_libraries(test.wasm)

samples/multi-thread/wasm-apps/main.c

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+
+static pthread_mutex_t mutex;
+static pthread_cond_t cond;
+
+static void *thread(void *arg)
+{
+    int *num = (int *)arg;
+
+    pthread_mutex_lock(&mutex);
+    printf("thread start \n");
+
+    for (int i = 0; i < 10; i++) {
+        *num = *num + 1;
+        printf("num: %d\n", *num);
+    }
+
+    pthread_cond_signal(&cond);
+    pthread_mutex_unlock(&mutex);
+
+    printf("thread exit \n");
+
+    return NULL;
+}
+
+int main(int argc, char *argv[])
+{
+    pthread_t tid;
+    int num = 0, ret = -1;
+
+    if (pthread_mutex_init(&mutex, NULL) != 0) {
+        printf("Failed to init mutex.\n");
+        return -1;
+    }
+    if (pthread_cond_init(&cond, NULL) != 0) {
+        printf("Failed to init cond.\n");
+        goto fail1;
+    }
+
+    pthread_mutex_lock(&mutex);
+    if (pthread_create(&tid, NULL, thread, &num) != 0) {
+        printf("Failed to create thread.\n");
+        goto fail2;
+    }
+
+    printf("cond wait start\n");
+    pthread_cond_wait(&cond, &mutex);
+    pthread_mutex_unlock(&mutex);
+    printf("cond wait success.\n");
+
+    if (pthread_join(tid, NULL) != 0) {
+        printf("Failed to join thread.\n");
+    }
+
+    ret = 0;
+
+fail2:
+    pthread_cond_destroy(&cond);
+fail1:
+    pthread_mutex_destroy(&mutex);
+
+    return ret;
+}