complete the create coroutine

include/asm_context.h

@@ -5,7 +5,7 @@
 
 typedef void* fcontext_t;
 
-intptr_t jump_fcontext(fcontext_t *ofc, fcontext_t nfc, intptr_t vp, bool preserve_fpu = false);
-fcontext_t make_fcontext(void *sp, size_t size, void (*fn)(intptr_t));
+extern intptr_t jump_fcontext(fcontext_t *ofc, fcontext_t nfc, intptr_t vp, bool preserve_fpu = false) asm("jump_fcontext");
+extern fcontext_t make_fcontext(void *sp, size_t size, void (*fn)(intptr_t)) asm("make_fcontext");
 
 #endif	/* ASM_CONTEXT_H */
\ No newline at end of file

include/context.h

@@ -12,7 +12,6 @@ class Context
 {
 public:
     Context(size_t stack_size, coroutine_func_t fn, void* private_data);
-    ~Context();
     bool swap_in();
     bool swap_out();
     static void context_func(void* arg); // coroutine entry function

include/coroutine.h

@@ -4,6 +4,8 @@
 #include "context.h"
 #include <unordered_map>
 
+#define DEFAULT_C_STACK_SIZE          (2 *1024 * 1024)
+
 namespace Study
 {
 class Coroutine

src/coroutine/context.cc

 #include "context.h"
 #include "study.h"
 
-
-using Study::Context;
+using namespace Study;
 
 Context::Context(size_t stack_size, coroutine_func_t fn, void* private_data) :
         fn_(fn), stack_size_(stack_size), private_data_(private_data)
 {
-#ifdef SW_CONTEXT_PROTECT_STACK_PAGE
-    protect_page_ = 0;
-#endif
     end_ = false;
     swap_ctx_ = nullptr;
 

src/coroutine/coroutine.cc

@@ -5,6 +5,7 @@ using Study::Coroutine;
 Coroutine* Coroutine::current = nullptr;
 long Coroutine::last_cid = 0;
 std::unordered_map<long, Coroutine*> Coroutine::coroutines;
+size_t Coroutine::stack_size = DEFAULT_C_STACK_SIZE;
 
 void* Coroutine::get_current_task()
 {