rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

add a seeded random number generator so that sequences of random numbers can be easily reproduced (for https://github.com/mozilla/rust/issues/2379)

Browse Source
This commit is contained in:
Gareth Daniel Smith
2012-05-20 14:06:54 +01:00
committed by Brian Anderson
parent 64130f1589
commit c9f8ae02bc
5 changed files with 117 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/rt/rust_builtin.cpp
View File

@@ -178,16 +178,41 @@ rust_str_push(rust_vec** sp, uint8_t byte) {
(*sp)->fill = fill + 1;
}
extern "C" CDECL rust_vec*
rand_seed() {
size_t size = sizeof(ub4) * RANDSIZ;
rust_task *task = rust_get_current_task();
rust_vec *v = (rust_vec *) task->kernel->malloc(vec_size<uint8_t>(size),
"rand_seed");
v->fill = v->alloc = size;
isaac_seed((uint8_t*) &v->data);
return v;
}
extern "C" CDECL void *
rand_new() {
rust_task *task = rust_get_current_task();
rust_sched_loop *thread = task->sched_loop;
randctx *rctx = (randctx *) task->malloc(sizeof(randctx), "randctx");
randctx *rctx = (randctx *) task->malloc(sizeof(randctx), "rand_new");
if (!rctx) {
task->fail();
return NULL;
}
isaac_init(thread->kernel, rctx);
isaac_init(thread->kernel, rctx, NULL);
return rctx;
}
extern "C" CDECL void *
rand_new_seeded(rust_vec* seed) {
rust_task *task = rust_get_current_task();
rust_sched_loop *thread = task->sched_loop;
randctx *rctx = (randctx *) task->malloc(sizeof(randctx),
"rand_new_seeded");
if (!rctx) {
task->fail();
return NULL;
}
isaac_init(thread->kernel, rctx, seed);
return rctx;
}