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Diffstat (limited to 'ext/fiddle/closure.c')
-rw-r--r--ext/fiddle/closure.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/ext/fiddle/closure.c b/ext/fiddle/closure.c
index b997e23f45d..2044c836ea0 100644
--- a/ext/fiddle/closure.c
+++ b/ext/fiddle/closure.c
@@ -13,11 +13,22 @@ typedef struct {
ffi_type **argv;
} fiddle_closure;
+#if defined(USE_FFI_CLOSURE_ALLOC)
+#elif !defined(HAVE_FFI_CLOSURE_ALLOC)
+# define USE_FFI_CLOSURE_ALLOC 0
+#else
+# define USE_FFI_CLOSURE_ALLOC 1
+#endif
+
static void
dealloc(void * ptr)
{
fiddle_closure * cls = (fiddle_closure *)ptr;
+#if USE_FFI_CLOSURE_ALLOC
ffi_closure_free(cls->pcl);
+#else
+ munmap(cls->pcl, sizeof(*cls->pcl));
+#endif
if (cls->argv) xfree(cls->argv);
xfree(cls);
}
@@ -191,7 +202,12 @@ allocate(VALUE klass)
VALUE i = TypedData_Make_Struct(klass, fiddle_closure,
&closure_data_type, closure);
+#if USE_FFI_CLOSURE_ALLOC
closure->pcl = ffi_closure_alloc(sizeof(ffi_closure), &closure->code);
+#else
+ closure->pcl = mmap(NULL, sizeof(ffi_closure), PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_PRIVATE, -1, 0);
+#endif
return i;
}
@@ -238,8 +254,17 @@ initialize(int rbargc, VALUE argv[], VALUE self)
if (FFI_OK != result)
rb_raise(rb_eRuntimeError, "error prepping CIF %d", result);
+#if USE_FFI_CLOSURE_ALLOC
result = ffi_prep_closure_loc(pcl, cif, callback,
(void *)self, cl->code);
+#else
+ result = ffi_prep_closure(pcl, cif, callback, (void *)self);
+ cl->code = (void *)pcl;
+ i = mprotect(pcl, sizeof(*pcl), PROT_READ | PROT_EXEC);
+ if (i) {
+ rb_sys_fail("mprotect");
+ }
+#endif
if (FFI_OK != result)
rb_raise(rb_eRuntimeError, "error prepping closure %d", result);