From 01052811be08444458576dda994d15f8823560ea Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Tue, 25 Jun 2024 23:25:29 +0300
Subject: initial rewrite to use ejit
+ Doesn't actually link yet due to missing stuff from ejit, will have to
add them (tomorrow?)
---
deps/lightening/tests/z_atomic.c | 88 ----------------------------------------
1 file changed, 88 deletions(-)
delete mode 100644 deps/lightening/tests/z_atomic.c
(limited to 'deps/lightening/tests/z_atomic.c')
diff --git a/deps/lightening/tests/z_atomic.c b/deps/lightening/tests/z_atomic.c
deleted file mode 100644
index 8612d15..0000000
--- a/deps/lightening/tests/z_atomic.c
+++ /dev/null
@@ -1,88 +0,0 @@
-#include "test.h"
-
-#include <threads.h>
-
-/* note non-atomic counter! */
-size_t num = 0;
-long lock_var = 0;
-void (*spin_lock)(void);
-void (*spin_unlock)(void);
-
-/* arbitrary number, as long as its large enough to likely allow other threads
- * to spawn. */
-#define THREAD_INCREMENTS 1000000
-static int
-loop(void *arg)
-{
- for (size_t i = 0; i < THREAD_INCREMENTS; ++i) {
- (*spin_lock)();
- num++;
- (*spin_unlock)();
- }
-
- return 0;
-}
-
-#define NUM_THREADS 10
-static void
-run_loops()
-{
- thrd_t threads[NUM_THREADS];
- for (size_t i = 0; i < NUM_THREADS; ++i)
- ASSERT(thrd_create(&threads[i], loop, NULL) == thrd_success);
-
- for (size_t i = 0; i < NUM_THREADS; ++i)
- ASSERT(thrd_join(threads[i], NULL) == thrd_success);
-
- ASSERT(num == NUM_THREADS * THREAD_INCREMENTS);
-}
-
-static size_t
-run_test(jit_state_t *_jit, uint8_t *arena_base, size_t arena_size)
-{
- jit_begin(_jit, arena_base, arena_size);
-
- /* based on https://rigtorp.se/spinlock/ */
- spin_lock = jit_address(_jit);
- {
- size_t frame = jit_enter_jit_abi(_jit, 0, 0, 0);
- void *do_exchange = jit_address(_jit);
- void *while_load = jit_address(_jit);
- /* do { */
- /* while (atomic_load(lock_var)); */
- jit_movi(_jit, JIT_R1, (jit_imm_t)&lock_var);
- jit_ldr_atomic(_jit, JIT_R0, JIT_R1);
- jit_patch_there(_jit, jit_bnei(_jit, JIT_R0, 0), while_load);
- /* } while (atomic_exchange(lock_var, 1)); */
- jit_movi(_jit, JIT_R0, 1);
- jit_swap_atomic(_jit, JIT_R0, JIT_R1, JIT_R0);
- jit_patch_there(_jit, jit_bnei(_jit, JIT_R0, 0), do_exchange);
- jit_leave_jit_abi(_jit, 0, 0, frame);
- jit_ret(_jit);
- }
-
- spin_unlock = jit_address(_jit);
- {
- size_t frame = jit_enter_jit_abi(_jit, 0, 0, 0);
- jit_movi(_jit, JIT_R0, 0);
- jit_movi(_jit, JIT_R1, (jit_imm_t)&lock_var);
- jit_str_atomic(_jit, JIT_R1, JIT_R0);
- jit_leave_jit_abi(_jit, 0, 0, frame);
- jit_ret(_jit);
- }
-
- size_t size;
- void *p = jit_end(_jit, &size);
-
- if (p)
- run_loops();
- else
- return size;
-
- return 0;
-}
-
-int main(int argc, char *argv[])
-{
- return main_compiler(argc, argv, run_test);
-}
--
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