Index: native_client_sdk/src/libraries/ppapi_stub/ppapi_main.c |
diff --git a/native_client_sdk/src/libraries/ppapi_stub/ppapi_main.c b/native_client_sdk/src/libraries/ppapi_stub/ppapi_main.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..be540b6b64fbf9d7da3ab651be626d6e00d0a85a |
--- /dev/null |
+++ b/native_client_sdk/src/libraries/ppapi_stub/ppapi_main.c |
@@ -0,0 +1,110 @@ |
+/* |
+ * Copyright (c) 2014 The Chromium Authors. All rights reserved. |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#include <pthread.h> |
+ |
+#include "irt_syscalls.h" |
+#include "ppapi/c/pp_module.h" |
+#include "ppapi/c/ppp.h" |
+ |
+struct PP_StartFunctions { |
+ int32_t (*PPP_InitializeModule)(PP_Module module_id, |
+ PPB_GetInterface get_browser_interface); |
+ void (*PPP_ShutdownModule)(); |
+ const void* (*PPP_GetInterface)(const char* interface_name); |
+}; |
+ |
+struct PP_ThreadFunctions { |
+ /* |
+ * This is a cut-down version of pthread_create()/pthread_join(). |
+ * We omit thread creation attributes and the thread's return value. |
+ * |
+ * We use uintptr_t as the thread ID type because pthread_t is not |
+ * part of the stable ABI; a user thread library might choose an |
+ * arbitrary size for its own pthread_t. |
+ */ |
+ int (*thread_create)(uintptr_t* tid, |
+ void (*func)(void* thread_argument), |
+ void* thread_argument); |
+ int (*thread_join)(uintptr_t tid); |
+}; |
+ |
+#define NACL_IRT_PPAPIHOOK_v0_1 "nacl-irt-ppapihook-0.1" |
+struct nacl_irt_ppapihook { |
+ int (*ppapi_start)(const struct PP_StartFunctions*); |
+ void (*ppapi_register_thread_creator)(const struct PP_ThreadFunctions*); |
+}; |
+ |
+ |
+static int thread_create(uintptr_t *tid, |
+ void (*func)(void *thread_argument), |
+ void *thread_argument) { |
+ /* |
+ * We know that newlib and glibc use a small pthread_t type, so we |
+ * do not need to wrap pthread_t values. |
+ */ |
+ return pthread_create((pthread_t *) tid, NULL, |
+ (void *(*)(void *thread_argument)) func, |
+ thread_argument); |
+} |
+ |
+static int thread_join(uintptr_t tid) { |
+ return pthread_join((pthread_t) tid, NULL); |
+} |
+ |
+/* |
+ * These are dangling references to functions that the application must define. |
+ */ |
+static const struct PP_StartFunctions ppapi_app_start_callbacks = { |
+ PPP_InitializeModule, |
+ PPP_ShutdownModule, |
+ PPP_GetInterface |
+}; |
+ |
+const static struct PP_ThreadFunctions thread_funcs = { |
+ thread_create, |
+ thread_join |
+}; |
+ |
+static void fatal_error(const char *message) { |
+ write(2, message, strlen(message)); |
+ _exit(127); |
+} |
+ |
+/* |
+ * We cannot tell at link time whether the application uses PPB_Audio, |
+ * because of the way that PPAPI is defined via runtime interface |
+ * query rather than a set of static functions. This means that we |
+ * register the audio thread functions unconditionally. This adds the |
+ * small overhead of pulling in pthread_create() even if the |
+ * application does not use PPB_Audio or libpthread. |
+ * |
+ * If an application developer wants to avoid that cost, they can |
+ * override this function with an empty definition. |
+ */ |
+void __nacl_register_thread_creator(const struct nacl_irt_ppapihook *hooks) { |
+ hooks->ppapi_register_thread_creator(&thread_funcs); |
+} |
+ |
+int PpapiPluginStart(const struct PP_StartFunctions *funcs) { |
+ struct nacl_irt_ppapihook hooks; |
+ if (sizeof(hooks) != __nacl_irt_query(NACL_IRT_PPAPIHOOK_v0_1, |
+ &hooks, sizeof(hooks))) { |
+ fatal_error("PpapiPluginStart: PPAPI hooks not found\n"); |
+ } |
+ |
+ __nacl_register_thread_creator(&hooks); |
+ return hooks.ppapi_start(funcs); |
+} |
+ |
+ |
+/* |
+ * The application's main (or the one supplied in this library) calls this |
+ * to start the PPAPI world. |
+ */ |
+int PpapiPluginMain(void) { |
+ return PpapiPluginStart(&ppapi_app_start_callbacks); |
+} |