MeowOS
a651df0e9b
ncm→bf6d2a79 已部署; 真机1次验证(风控合规): status_check 721ms rc=0 uid=408996274; user_playlist 2.5s rc=0 count=64
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
/* monotonic_test.c — 宿主验证 ncm_now_ms(REALTIME) 与 ncm_monotonic_ms(MONOTONIC)。
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* 演示：用墙钟算 deadline 在「NTP 拨钟回退 Δ」时，(deadline-now) 被放大成巨大 rem；
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* 用单调钟则不受影响（每次至多等剩余 deadline）。
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*/
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#include "ncm.h"
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#include "ncm_common.h"
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#include <stdio.h>
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#include <unistd.h>
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int main(void) {
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int64_t w0 = ncm_now_ms();
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int64_t m0 = ncm_monotonic_ms();
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usleep(50 * 1000);
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int64_t w1 = ncm_now_ms();
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int64_t m1 = ncm_monotonic_ms();
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printf("REALTIME advance: %lld ms\n", (long long)(w1 - w0));
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printf("MONOTONIC advance: %lld ms\n", (long long)(m1 - m0));
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if (w1 <= w0 || m1 <= m0) { printf("FAIL: clock not advancing\n"); return 1; }
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/* 模拟 NTP 把墙钟拨回 Δ=6h 后，(deadline-now) 的变化 */
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int64_t base_w = w0;
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int64_t base_m = m0;
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int64_t tmo = 15000;
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int64_t dline_w = base_w + tmo, dline_m = base_m + tmo;
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int64_t jump = 6 * 3600 * 1000; /* 拨回 6 小时 */
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/* REALTIME：now 回退 jump → rem 巨大 */
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int64_t now_w = base_w - jump;
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uint32_t rem_w = (uint32_t)(dline_w - now_w);
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/* MONOTONIC：now 不受跳变影响 */
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int64_t now_m = base_m;
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uint32_t rem_m = (uint32_t)(dline_m - now_m);
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printf("REALTIME rem after -6h jump = %u ms (%.1f h)\n", rem_w, rem_w / 3600000.0);
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printf("MONOTONIC rem after -6h jump = %u ms (%.2f s)\n", rem_m, rem_m / 1000.0);
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if (rem_w > rem_m) printf("OK: REALTIME overflow confirmed, MONOTONIC unaffected\n");
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else { printf("FAIL: expected REALTIME rem to blow up\n"); return 1; }
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return 0;
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}
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