| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // |
| // Internal declarations used by the C tracing macros. |
| // This is not part of the public API: use <trace/event.h> instead. |
| // |
| |
| #ifndef ZIRCON_SYSTEM_ULIB_LIB_TRACE_INTERNAL_PAIRS_INTERNAL_H_ |
| #define ZIRCON_SYSTEM_ULIB_LIB_TRACE_INTERNAL_PAIRS_INTERNAL_H_ |
| |
| // Count the number of pairs of arguments passed to it without evaluating them. |
| // When the number of arguments is uneven, rounds down. |
| // Works with 0 to 15 pairs. |
| #define TRACE_INTERNAL_COUNT_PAIRS(...) \ |
| TRACE_INTERNAL_COUNT_PAIRS_(__VA_ARGS__, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, \ |
| 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0) |
| #define TRACE_INTERNAL_COUNT_PAIRS_(_15, _15X, _14, _14X, _13, _13X, _12, _12X, _11, _11X, _10, \ |
| _10X, _9, _9X, _8, _8X, _7, _7X, _6, _6X, _5, _5X, _4, _4X, \ |
| _3, _3X, _2, _2X, _1, _1X, N, ...) \ |
| N |
| |
| // Applies a function or macro to each pair of arguments. |
| // Works with 0 to 15 pairs. |
| // |
| // |fn| is the function or macro name to apply |
| // |vn| is the name of a local variable that the caller may be using. It is |
| // passed on to |fn| in case it needs it, e.g., to uniquify any further local |
| // variable names that |fn| as a macro may want to create. |
| // |
| // |fn| must accept four arguments: |
| // - |vn|, described above |
| // - |idx|, which is 0,1,2,...,15 and designates the index of the name/value |
| // pair in the provided list |
| // - |key|, which is the key part of the key/value pair |
| // - |value|, which is the value part of the key/value pair |
| // |
| // Example: |
| // #define MY_FN(vn, idx, a, b) |
| // TRACE_INTERNAL_APPLY_PAIRWISE(MY_FN, my_var, "x", 1, "y", 2) |
| |
| #define TRACE_INTERNAL_APPLY_PAIRWISE(fn, vn, ...) \ |
| TRACE_INTERNAL_APPLY_PAIRWISE_(TRACE_INTERNAL_COUNT_PAIRS(__VA_ARGS__)) \ |
| (fn, vn, __VA_ARGS__) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_(n) TRACE_INTERNAL_APPLY_PAIRWISE__(n) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE__(n) TRACE_INTERNAL_APPLY_PAIRWISE##n |
| // clang-format off |
| #define TRACE_INTERNAL_APPLY_PAIRWISE0(fn, vn, ...) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE1(fn, vn, k1, v1) \ |
| fn(vn, 1, k1, v1) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE2(fn, vn, k1, v1, k2, v2) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE3(fn, vn, k1, v1, k2, v2, k3, v3) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE4(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE5(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE6(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE7(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE8(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE9(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE10(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE11(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) fn(vn, 11, k11, v11) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE12(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) fn(vn, 11, k11, v11) fn(vn, 12, k12, v12) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE13(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) fn(vn, 11, k11, v11) fn(vn, 12, k12, v12) \ |
| fn(vn, 13, k13, v13) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE14(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13, k14, v14) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) fn(vn, 11, k11, v11) fn(vn, 12, k12, v12) \ |
| fn(vn, 13, k13, v13) fn(vn, 14, k14, v14) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE15(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13, k14, v14, k15, v15) \ |
| fn(vn, 1, k1, v1) fn(vn, 2, k2, v2) fn(vn, 3, k3, v3) fn(vn, 4, k4, v4) \ |
| fn(vn, 5, k5, v5) fn(vn, 6, k6, v6) fn(vn, 7, k7, v7) fn(vn, 8, k8, v8) \ |
| fn(vn, 9, k9, v9) fn(vn, 10, k10, v10) fn(vn, 11, k11, v11) fn(vn, 12, k12, v12) \ |
| fn(vn, 13, k13, v13) fn(vn, 14, k14, v14) fn(vn, 15, k15, v15) |
| // clang-format on |
| |
| // Applies a function or macro to each pair of arguments to produce a |
| // comma-separated result. Works with 0 to 15 pairs. |
| // |
| // Example: |
| // #define MY_FN(vn, idx, a, b) |
| // TRACE_INTERNAL_APPLY_PAIRWISE_CSV(MY_FN, my_var, "x", 1, "y", 2) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV(fn, vn, ...) \ |
| TRACE_INTERNAL_APPLY_PAIRWISE_CSV_(TRACE_INTERNAL_COUNT_PAIRS(__VA_ARGS__)) \ |
| (fn, vn, __VA_ARGS__) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV_(n) TRACE_INTERNAL_APPLY_PAIRWISE_CSV__(n) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV__(n) TRACE_INTERNAL_APPLY_PAIRWISE_CSV##n |
| // clang-format off |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV0(fn, vn, ...) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV1(fn, vn, k1, v1) \ |
| fn(vn, 1, k1, v1) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV2(fn, vn, k1, v1, k2, v2) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV3(fn, vn, k1, v1, k2, v2, k3, v3) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV4(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV5(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV6(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV7(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV8(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV9(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV10(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV11(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10), fn(vn, 11, k11, v11) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV12(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10), fn(vn, 11, k11, v11), fn(vn, 12, k12, v12) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV13(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10), fn(vn, 11, k11, v11), fn(vn, 12, k12, v12), \ |
| fn(vn, 13, k13, v13) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV14(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13, k14, v14) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10), fn(vn, 11, k11, v11), fn(vn, 12, k12, v12), \ |
| fn(vn, 13, k13, v13), fn(vn, 14, k14, v14) |
| #define TRACE_INTERNAL_APPLY_PAIRWISE_CSV15(fn, vn, k1, v1, k2, v2, k3, v3, k4, v4, \ |
| k5, v5, k6, v6, k7, v7, k8, v8, \ |
| k9, v9, k10, v10, k11, v11, k12, v12, \ |
| k13, v13, k14, v14, k15, v15) \ |
| fn(vn, 1, k1, v1), fn(vn, 2, k2, v2), fn(vn, 3, k3, v3), fn(vn, 4, k4, v4), \ |
| fn(vn, 5, k5, v5), fn(vn, 6, k6, v6), fn(vn, 7, k7, v7), fn(vn, 8, k8, v8), \ |
| fn(vn, 9, k9, v9), fn(vn, 10, k10, v10), fn(vn, 11, k11, v11), fn(vn, 12, k12, v12), \ |
| fn(vn, 13, k13, v13), fn(vn, 14, k14, v14), fn(vn, 15, k15, v15) |
| // clang-format on |
| |
| #endif // ZIRCON_SYSTEM_ULIB_LIB_TRACE_INTERNAL_PAIRS_INTERNAL_H_ |
