{ "type": "excalidraw", "version": 2, "source": "https://excalidraw.com", "elements": [ { "id": "r585006092", "type": "rectangle", "x": 20, "y": 20, "width": 900, "height": 190, "angle": 0, "strokeColor": "#dddddd", "backgroundColor": "#f4f4f4", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 622063416, "versionNonce": 1337574242, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t498282517", "type": "text", "x": 32, "y": 26, "width": 323.40000000000003, "height": 15.0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1101525496, "versionNonce": 1602537561, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "kernel \u2014 every signal passes the same three words", "fontSize": 12, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "kernel \u2014 every signal passes the same three words", "lineHeight": 1.25, "baseline": 12 }, { "id": "r1032425404", "type": "rectangle", "x": 20, "y": 230, "width": 900, "height": 240, "angle": 0, "strokeColor": "#dddddd", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 645560421, "versionNonce": 1494935167, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t786622167", "type": "text", "x": 32, "y": 236, "width": 501.6, "height": 15.0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1365952268, "versionNonce": 1331288654, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "pmon supervise \u2014 three ways to hear the same signals, none in signal context", "fontSize": 12, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "pmon supervise \u2014 three ways to hear the same signals, none in signal context", "lineHeight": 1.25, "baseline": 12 }, { "id": "r598491652", "type": "rectangle", "x": 40, "y": 55, "width": 150, "height": 52, "angle": 0, "strokeColor": "#999999", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 465126405, "versionNonce": 1106313751, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1235820508", "type": "text", "x": 50, "y": 63, "width": 123.20000000000002, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 455064631, "versionNonce": 218528111, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "kill -TERM ", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "kill -TERM ", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1281326419", "type": "text", "x": 50, "y": 83, "width": 114.95, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1941035529, "versionNonce": 1688181600, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "tgkill, terminal ^C", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "tgkill, terminal ^C", "lineHeight": 1.25, "baseline": 11 }, { "id": "r873352062", "type": "rectangle", "x": 40, "y": 125, "width": 150, "height": 52, "angle": 0, "strokeColor": "#999999", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1163884097, "versionNonce": 1273507206, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1839275286", "type": "text", "x": 50, "y": 133, "width": 84.7, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 905415382, "versionNonce": 1364012759, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "child exits", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "child exits", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1296921273", "type": "text", "x": 50, "y": 153, "width": 127.05000000000001, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1614103830, "versionNonce": 4657451, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "kernel raises SIGCHLD", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "kernel raises SIGCHLD", "lineHeight": 1.25, "baseline": 11 }, { "id": "r301817459", "type": "rectangle", "x": 240, "y": 55, "width": 200, "height": 58, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1383108780, "versionNonce": 1298308348, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1236264407", "type": "text", "x": 250, "y": 63, "width": 192.50000000000003, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1732977168, "versionNonce": 1552034686, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "disposition (per-process)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "disposition (per-process)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t118076754", "type": "text", "x": 250, "y": 83, "width": 163.35000000000002, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1370729174, "versionNonce": 825452387, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "SIG_DFL / SIG_IGN / handler", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "SIG_DFL / SIG_IGN / handler", "lineHeight": 1.25, "baseline": 11 }, { "id": "r701954369", "type": "rectangle", "x": 240, "y": 128, "width": 200, "height": 58, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 110939747, "versionNonce": 1611328088, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1629931015", "type": "text", "x": 250, "y": 136, "width": 130.9, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 843888316, "versionNonce": 1503804339, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "mask (per-thread)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "mask (per-thread)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1860125726", "type": "text", "x": 250, "y": 156, "width": 121.00000000000001, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 829031168, "versionNonce": 58319530, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "blocked signals wait", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "blocked signals wait", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1706583714", "type": "rectangle", "x": 490, "y": 90, "width": 200, "height": 58, "angle": 0, "strokeColor": "#e8870c", "backgroundColor": "#fff8ef", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1423358464, "versionNonce": 1903342459, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t176484996", "type": "text", "x": 500, "y": 98, "width": 84.7, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 757184596, "versionNonce": 1666077880, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "pending set", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "pending set", "lineHeight": 1.25, "baseline": 14 }, { "id": "t404849259", "type": "text", "x": 500, "y": 118, "width": 181.50000000000003, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1598819740, "versionNonce": 773778095, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "one bit per signal \u2014 coalesces", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "one bit per signal \u2014 coalesces", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1929108026", "type": "rectangle", "x": 730, "y": 90, "width": 170, "height": 58, "angle": 0, "strokeColor": "#999999", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1168388303, "versionNonce": 1638086355, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1077234921", "type": "text", "x": 740, "y": 98, "width": 61.60000000000001, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1310111428, "versionNonce": 1896365227, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "delivery", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "delivery", "lineHeight": 1.25, "baseline": 14 }, { "id": "t119673380", "type": "text", "x": 740, "y": 118, "width": 114.95, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1728278136, "versionNonce": 207967048, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "only when unblocked", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "only when unblocked", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1820806622", "type": "rectangle", "x": 40, "y": 270, "width": 260, "height": 58, "angle": 0, "strokeColor": "#2f6db5", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1141368843, "versionNonce": 629821178, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1502845550", "type": "text", "x": 50, "y": 278, "width": 130.9, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 262922666, "versionNonce": 997408523, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "C++ - signalfd(2)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "C++ - signalfd(2)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1502902010", "type": "text", "x": 50, "y": 298, "width": 169.4, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1969783633, "versionNonce": 1481548508, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "mask blocks all four signals", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "mask blocks all four signals", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1189609796", "type": "rectangle", "x": 40, "y": 390, "width": 260, "height": 58, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 891504344, "versionNonce": 1480647614, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t639073874", "type": "text", "x": 50, "y": 398, "width": 123.20000000000002, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 749655562, "versionNonce": 1268963416, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "poll + read(sfd)", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "poll + read(sfd)", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1624180022", "type": "text", "x": 50, "y": 418, "width": 139.15, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1531652457, "versionNonce": 1606451351, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "signalfd_siginfo record", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "signalfd_siginfo record", "lineHeight": 1.25, "baseline": 11 }, { "id": "r159862551", "type": "rectangle", "x": 340, "y": 270, "width": 260, "height": 58, "angle": 0, "strokeColor": "#2f6db5", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 994592140, "versionNonce": 1518802246, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1933835294", "type": "text", "x": 350, "y": 278, "width": 154.0, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1179561634, "versionNonce": 309589107, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "Go - runtime handler", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "Go - runtime handler", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1949686345", "type": "text", "x": 350, "y": 298, "width": 175.45000000000002, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 231624731, "versionNonce": 566874997, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "installed by 114 rt_sigaction", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "installed by 114 rt_sigaction", "lineHeight": 1.25, "baseline": 11 }, { "id": "r37367043", "type": "rectangle", "x": 340, "y": 390, "width": 260, "height": 58, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1496523350, "versionNonce": 1169718170, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t546467986", "type": "text", "x": 350, "y": 398, "width": 161.70000000000002, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1547546668, "versionNonce": 1915935856, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "signal.Notify channel", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "signal.Notify channel", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1420833855", "type": "text", "x": 350, "y": 418, "width": 181.50000000000003, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1374803910, "versionNonce": 1212034777, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "select over sig / wait / timer", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "select over sig / wait / timer", "lineHeight": 1.25, "baseline": 11 }, { "id": "r1061127413", "type": "rectangle", "x": 640, "y": 270, "width": 260, "height": 58, "angle": 0, "strokeColor": "#2f6db5", "backgroundColor": "#eef4fb", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 452163040, "versionNonce": 933739321, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t585154216", "type": "text", "x": 650, "y": 278, "width": 184.8, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 194355593, "versionNonce": 572604650, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "Rust - self-pipe handler", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "Rust - self-pipe handler", "lineHeight": 1.25, "baseline": 14 }, { "id": "t1405578758", "type": "text", "x": 650, "y": 298, "width": 169.4, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 811984327, "versionNonce": 242685856, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "AtomicBool + write(doorbell)", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "AtomicBool + write(doorbell)", "lineHeight": 1.25, "baseline": 11 }, { "id": "r880898685", "type": "rectangle", "x": 640, "y": 390, "width": 260, "height": 58, "angle": 0, "strokeColor": "#111111", "backgroundColor": "#ffffff", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 3 }, "seed": 1139153558, "versionNonce": 1204526343, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false }, { "id": "t1639916193", "type": "text", "x": 650, "y": 398, "width": 223.3, "height": 17.5, "angle": 0, "strokeColor": "#111111", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1733653668, "versionNonce": 1845864534, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "poll pipe, drain, check flags", "fontSize": 14, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "poll pipe, drain, check flags", "lineHeight": 1.25, "baseline": 14 }, { "id": "t657297147", "type": "text", "x": 650, "y": 418, "width": 157.3, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 588552775, "versionNonce": 1753078657, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "waitpid(WNOHANG) for truth", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "waitpid(WNOHANG) for truth", "lineHeight": 1.25, "baseline": 11 }, { "id": "a788251330", "type": "arrow", "x": 190, "y": 81, "width": 50, "height": 3, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1566303304, "versionNonce": 1348136400, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 50, 3 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1253619272", "type": "arrow", "x": 190, "y": 151, "width": 50, "height": 6, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 474126109, "versionNonce": 1346003739, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 50, 6 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1254577134", "type": "arrow", "x": 440, "y": 84, "width": 50, "height": 24, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1906651320, "versionNonce": 57252121, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 50, 24 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1767754716", "type": "text", "x": 465.0, "y": 82.0, "width": 78.65, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1158870109, "versionNonce": 1189357567, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "checked first", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "checked first", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1832579801", "type": "arrow", "x": 440, "y": 157, "width": 50, "height": 27, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1210900194, "versionNonce": 903797098, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 50, -27 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1560671677", "type": "text", "x": 465.0, "y": 129.5, "width": 127.05000000000001, "height": 13.75, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1184592776, "versionNonce": 185683785, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "blocked? stay pending", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "blocked? stay pending", "lineHeight": 1.25, "baseline": 11 }, { "id": "a292858014", "type": "arrow", "x": 690, "y": 119, "width": 40, "height": 0, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 373542047, "versionNonce": 504106091, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 40, 0 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1136445913", "type": "arrow", "x": 170, "y": 328, "width": 0, "height": 62, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1758271886, "versionNonce": 1078864911, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, 62 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1350408311", "type": "text", "x": 170.0, "y": 345.0, "width": 72.60000000000001, "height": 13.75, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 848116343, "versionNonce": 1430527113, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "read as data", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "read as data", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1583538215", "type": "arrow", "x": 470, "y": 328, "width": 0, "height": 62, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 77101951, "versionNonce": 1071778908, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, 62 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1366405702", "type": "text", "x": 470.0, "y": 345.0, "width": 72.60000000000001, "height": 13.75, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1276514074, "versionNonce": 130762705, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "channel send", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "channel send", "lineHeight": 1.25, "baseline": 11 }, { "id": "a944482591", "type": "arrow", "x": 770, "y": 328, "width": 0, "height": 62, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 513475540, "versionNonce": 343048526, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 0, 62 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1485747309", "type": "text", "x": 770.0, "y": 345.0, "width": 78.65, "height": 13.75, "angle": 0, "strokeColor": "#b8650a", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1333418770, "versionNonce": 875149749, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "doorbell byte", "fontSize": 11, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "doorbell byte", "lineHeight": 1.25, "baseline": 11 }, { "id": "a1938341013", "type": "arrow", "x": 560, "y": 148, "width": 390, "height": 122, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 731218578, "versionNonce": 284122877, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ -390, 122 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a764542507", "type": "arrow", "x": 590, "y": 148, "width": 120, "height": 122, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 641627639, "versionNonce": 1335691071, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ -120, 122 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "a1403974184", "type": "arrow", "x": 620, "y": 148, "width": 150, "height": 122, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 2, "strokeStyle": "dashed", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": { "type": 2 }, "seed": 1980489728, "versionNonce": 13307114, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "points": [ [ 0, 0 ], [ 150, 122 ] ], "lastCommittedPoint": null, "startBinding": null, "endBinding": null, "startArrowhead": null, "endArrowhead": "arrow" }, { "id": "t1121699780", "type": "text", "x": 730, "y": 165, "width": 179.025, "height": 13.125, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1273767193, "versionNonce": 598791934, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "handlers may run on any thread,", "fontSize": 10.5, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "handlers may run on any thread,", "lineHeight": 1.25, "baseline": 10.5 }, { "id": "t1390001947", "type": "text", "x": 730, "y": 179, "width": 161.70000000000002, "height": 13.125, "angle": 0, "strokeColor": "#555555", "backgroundColor": "transparent", "fillStyle": "solid", "strokeWidth": 1, "strokeStyle": "solid", "roughness": 1, "opacity": 100, "groupIds": [], "frameId": null, "roundness": null, "seed": 1870129548, "versionNonce": 211660115, "isDeleted": false, "boundElements": [], "updated": 1, "link": null, "locked": false, "text": "between any two instructions", "fontSize": 10.5, "fontFamily": 1, "textAlign": "left", "verticalAlign": "top", "containerId": null, "originalText": "between any two instructions", "lineHeight": 1.25, "baseline": 10.5 } ], "appState": { "viewBackgroundColor": "#ffffff", "gridSize": null }, "files": {} }