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Refactor set_stack_bottom method

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This commit is contained in:
Yota Toyama
2019-06-01 22:14:24 +00:00
parent 42b2f3f48f
commit 4c9aa84dc8
1 changed files with 6 additions and 16 deletions
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22
src/lib.rs
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@@ -16,10 +16,6 @@ struct GcStackBase {
#[link(name = "gc", kind = "static")] #[link(name = "gc", kind = "static")]
extern "C" { extern "C" {
fn GC_allow_register_threads() -> c_void; fn GC_allow_register_threads() -> c_void;
fn GC_call_with_alloc_lock(
callback: unsafe extern "C" fn(*const c_void) -> *const c_void,
client_data: *const c_void,
) -> *const c_void;
fn GC_alloc_lock() -> c_void; fn GC_alloc_lock() -> c_void;
fn GC_alloc_unlock() -> c_void; fn GC_alloc_unlock() -> c_void;
fn GC_free(ptr: *mut c_void); fn GC_free(ptr: *mut c_void);
@@ -62,7 +58,12 @@ impl Allocator {
} }
pub unsafe fn set_stack_bottom(bottom: *const u8) { pub unsafe fn set_stack_bottom(bottom: *const u8) {
GC_call_with_alloc_lock(set_stack_bottom, std::mem::transmute(bottom)); GC_set_stackbottom(
std::ptr::null(),
&GcStackBase {
mem_base: bottom as *const libc::c_void,
},
);
} }
pub unsafe fn unregister_current_thread() { pub unsafe fn unregister_current_thread() {
@@ -79,14 +80,3 @@ unsafe impl GlobalAlloc for Allocator {
GC_free(ptr as *mut c_void) GC_free(ptr as *mut c_void)
} }
} }
// client_data is an address of a stack bottom of the current thread.
unsafe extern "C" fn set_stack_bottom(client_data: *const c_void) -> *const c_void {
let base = GcStackBase {
mem_base: client_data,
};
GC_set_stackbottom(std::ptr::null(), &base);
return std::ptr::null();
}