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Support a special const-value refcount, use it for const strings.

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This commit is contained in:
Graydon Hoare
2010-11-09 14:15:07 -08:00
parent 3e9be14757
commit 89946609f2
10 changed files with 97 additions and 30 deletions
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12
src/rt/rust_builtin.cpp
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@@ -61,8 +61,12 @@ align_of(rust_task *task, type_desc *t) {
return t->align;
}
extern "C" CDECL size_t
refcount(rust_task *task, type_desc *t, size_t *v) {
extern "C" CDECL intptr_t
refcount(rust_task *task, type_desc *t, intptr_t *v) {
if (*v == CONST_REFCOUNT)
return CONST_REFCOUNT;
// Passed-in value has refcount 1 too high
// because it was ref'ed while making the call.
return (*v) - 1;
@@ -277,7 +281,9 @@ debug_box(rust_task *task, type_desc *t, rust_box *box)
task->log(rust_log::STDLIB, "debug_box(0x%" PRIxPTR ")", box);
debug_tydesc_helper(task, t);
task->log(rust_log::STDLIB, " refcount %" PRIdPTR,
box->ref_count - 1); // -1 because we ref'ed for this call
box->ref_count == CONST_REFCOUNT
? CONST_REFCOUNT
: box->ref_count - 1); // -1 because we ref'ed for this call
for (uintptr_t i = 0; i < t->size; ++i) {
task->log(rust_log::STDLIB,
" byte %" PRIdPTR ": 0x%" PRIx8, i, box->data[i]);