millisBeforeDeadline() — netty Function Reference

Architecture documentation for the millisBeforeDeadline() function in NioIoHandler.java from the netty codebase.

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Dependency Diagram

graph TD
  430fa9ce_cc53_2a86_0feb_11916b32c02f["millisBeforeDeadline()"]
  db526e28_8aae_a182_b56b_dc12824d89f5["NioIoHandler"]
  430fa9ce_cc53_2a86_0feb_11916b32c02f -->|defined in| db526e28_8aae_a182_b56b_dc12824d89f5
  b18c5ab3_f5bb_81ad_70bd_20524d394f59["select()"]
  b18c5ab3_f5bb_81ad_70bd_20524d394f59 -->|calls| 430fa9ce_cc53_2a86_0feb_11916b32c02f
  style 430fa9ce_cc53_2a86_0feb_11916b32c02f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

transport/src/main/java/io/netty/channel/nio/NioIoHandler.java lines 724–734

    private static long millisBeforeDeadline(long selectDeadLineNanos, long currentTimeNanos) {
        assert selectDeadLineNanos != Long.MAX_VALUE;
        long nanosBeforeDeadline = selectDeadLineNanos - currentTimeNanos;
        // Prevent overflow when adding the rounding bias:
        // if we don't do this, it would appear as the deadline is already reached!
        if (nanosBeforeDeadline >= Long.MAX_VALUE - 500_000L) {
            return Long.MAX_VALUE / 1_000_000L;
        }
        // Add 500_000 to round up to the nearest millisecond.
        return (nanosBeforeDeadline + 500_000L) / 1_000_000L;
    }