1*38e8c45fSAndroid Build Coastguard Worker /*
2*38e8c45fSAndroid Build Coastguard Worker * Copyright (C) 2020 The Android Open Source Project
3*38e8c45fSAndroid Build Coastguard Worker *
4*38e8c45fSAndroid Build Coastguard Worker * Licensed under the Apache License, Version 2.0 (the "License");
5*38e8c45fSAndroid Build Coastguard Worker * you may not use this file except in compliance with the License.
6*38e8c45fSAndroid Build Coastguard Worker * You may obtain a copy of the License at
7*38e8c45fSAndroid Build Coastguard Worker *
8*38e8c45fSAndroid Build Coastguard Worker * http://www.apache.org/licenses/LICENSE-2.0
9*38e8c45fSAndroid Build Coastguard Worker *
10*38e8c45fSAndroid Build Coastguard Worker * Unless required by applicable law or agreed to in writing, software
11*38e8c45fSAndroid Build Coastguard Worker * distributed under the License is distributed on an "AS IS" BASIS,
12*38e8c45fSAndroid Build Coastguard Worker * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*38e8c45fSAndroid Build Coastguard Worker * See the License for the specific language governing permissions and
14*38e8c45fSAndroid Build Coastguard Worker * limitations under the License.
15*38e8c45fSAndroid Build Coastguard Worker */
16*38e8c45fSAndroid Build Coastguard Worker
17*38e8c45fSAndroid Build Coastguard Worker #pragma once
18*38e8c45fSAndroid Build Coastguard Worker
19*38e8c45fSAndroid Build Coastguard Worker #include <stddef.h>
20*38e8c45fSAndroid Build Coastguard Worker #include <sys/uio.h>
21*38e8c45fSAndroid Build Coastguard Worker #include <chrono>
22*38e8c45fSAndroid Build Coastguard Worker #include <cstdint>
23*38e8c45fSAndroid Build Coastguard Worker #include <optional>
24*38e8c45fSAndroid Build Coastguard Worker
25*38e8c45fSAndroid Build Coastguard Worker #include <binder/Common.h>
26*38e8c45fSAndroid Build Coastguard Worker #include <log/log.h>
27*38e8c45fSAndroid Build Coastguard Worker #include <utils/Errors.h>
28*38e8c45fSAndroid Build Coastguard Worker
29*38e8c45fSAndroid Build Coastguard Worker #define PLOGE(fmt, ...) \
30*38e8c45fSAndroid Build Coastguard Worker do { \
31*38e8c45fSAndroid Build Coastguard Worker auto savedErrno = errno; \
32*38e8c45fSAndroid Build Coastguard Worker ALOGE(fmt ": %s" __VA_OPT__(, ) __VA_ARGS__, strerror(savedErrno)); \
33*38e8c45fSAndroid Build Coastguard Worker } while (0)
34*38e8c45fSAndroid Build Coastguard Worker #define PLOGF(fmt, ...) \
35*38e8c45fSAndroid Build Coastguard Worker do { \
36*38e8c45fSAndroid Build Coastguard Worker auto savedErrno = errno; \
37*38e8c45fSAndroid Build Coastguard Worker LOG_ALWAYS_FATAL(fmt ": %s" __VA_OPT__(, ) __VA_ARGS__, strerror(savedErrno)); \
38*38e8c45fSAndroid Build Coastguard Worker } while (0)
39*38e8c45fSAndroid Build Coastguard Worker
40*38e8c45fSAndroid Build Coastguard Worker /* TEMP_FAILURE_RETRY is not available on macOS and Trusty. */
41*38e8c45fSAndroid Build Coastguard Worker #ifndef TEMP_FAILURE_RETRY
42*38e8c45fSAndroid Build Coastguard Worker /* Used to retry syscalls that can return EINTR. */
43*38e8c45fSAndroid Build Coastguard Worker #define TEMP_FAILURE_RETRY(exp) \
44*38e8c45fSAndroid Build Coastguard Worker ({ \
45*38e8c45fSAndroid Build Coastguard Worker __typeof__(exp) _rc; \
46*38e8c45fSAndroid Build Coastguard Worker do { \
47*38e8c45fSAndroid Build Coastguard Worker _rc = (exp); \
48*38e8c45fSAndroid Build Coastguard Worker } while (_rc == -1 && errno == EINTR); \
49*38e8c45fSAndroid Build Coastguard Worker _rc; \
50*38e8c45fSAndroid Build Coastguard Worker })
51*38e8c45fSAndroid Build Coastguard Worker #endif
52*38e8c45fSAndroid Build Coastguard Worker
53*38e8c45fSAndroid Build Coastguard Worker #define TEST_AND_RETURN(value, expr) \
54*38e8c45fSAndroid Build Coastguard Worker do { \
55*38e8c45fSAndroid Build Coastguard Worker if (!(expr)) { \
56*38e8c45fSAndroid Build Coastguard Worker ALOGE("Failed to call: %s", #expr); \
57*38e8c45fSAndroid Build Coastguard Worker return value; \
58*38e8c45fSAndroid Build Coastguard Worker } \
59*38e8c45fSAndroid Build Coastguard Worker } while (0)
60*38e8c45fSAndroid Build Coastguard Worker
61*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_PRAGMA(arg) _Pragma(#arg)
62*38e8c45fSAndroid Build Coastguard Worker #if defined(__clang__)
63*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_PRAGMA_FOR_COMPILER(arg) LIBBINDER_PRAGMA(clang arg)
64*38e8c45fSAndroid Build Coastguard Worker #elif defined(__GNUC__)
65*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_PRAGMA_FOR_COMPILER(arg) LIBBINDER_PRAGMA(GCC arg)
66*38e8c45fSAndroid Build Coastguard Worker #else
67*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_PRAGMA_FOR_COMPILER(arg)
68*38e8c45fSAndroid Build Coastguard Worker #endif
69*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_IGNORE(warning_flag) \
70*38e8c45fSAndroid Build Coastguard Worker LIBBINDER_PRAGMA_FOR_COMPILER(diagnostic push) \
71*38e8c45fSAndroid Build Coastguard Worker LIBBINDER_PRAGMA_FOR_COMPILER(diagnostic ignored warning_flag)
72*38e8c45fSAndroid Build Coastguard Worker #define LIBBINDER_IGNORE_END() LIBBINDER_PRAGMA_FOR_COMPILER(diagnostic pop)
73*38e8c45fSAndroid Build Coastguard Worker
74*38e8c45fSAndroid Build Coastguard Worker namespace android {
75*38e8c45fSAndroid Build Coastguard Worker
76*38e8c45fSAndroid Build Coastguard Worker /**
77*38e8c45fSAndroid Build Coastguard Worker * Get the size of a statically initialized array.
78*38e8c45fSAndroid Build Coastguard Worker *
79*38e8c45fSAndroid Build Coastguard Worker * \param N the array to get the size of.
80*38e8c45fSAndroid Build Coastguard Worker * \return the size of the array.
81*38e8c45fSAndroid Build Coastguard Worker */
82*38e8c45fSAndroid Build Coastguard Worker template <typename T, size_t N>
countof(T (&)[N])83*38e8c45fSAndroid Build Coastguard Worker constexpr size_t countof(T (&)[N]) {
84*38e8c45fSAndroid Build Coastguard Worker return N;
85*38e8c45fSAndroid Build Coastguard Worker }
86*38e8c45fSAndroid Build Coastguard Worker
87*38e8c45fSAndroid Build Coastguard Worker // avoid optimizations
88*38e8c45fSAndroid Build Coastguard Worker void zeroMemory(uint8_t* data, size_t size);
89*38e8c45fSAndroid Build Coastguard Worker
90*38e8c45fSAndroid Build Coastguard Worker // View of contiguous sequence. Similar to std::span.
91*38e8c45fSAndroid Build Coastguard Worker template <typename T>
92*38e8c45fSAndroid Build Coastguard Worker struct Span {
93*38e8c45fSAndroid Build Coastguard Worker T* data = nullptr;
94*38e8c45fSAndroid Build Coastguard Worker size_t size = 0;
95*38e8c45fSAndroid Build Coastguard Worker
byteSizeSpan96*38e8c45fSAndroid Build Coastguard Worker size_t byteSize() { return size * sizeof(T); }
97*38e8c45fSAndroid Build Coastguard Worker
toIovecSpan98*38e8c45fSAndroid Build Coastguard Worker iovec toIovec() { return {const_cast<std::remove_const_t<T>*>(data), byteSize()}; }
99*38e8c45fSAndroid Build Coastguard Worker
100*38e8c45fSAndroid Build Coastguard Worker // Truncates `this` to a length of `offset` and returns a span with the
101*38e8c45fSAndroid Build Coastguard Worker // remainder.
102*38e8c45fSAndroid Build Coastguard Worker //
103*38e8c45fSAndroid Build Coastguard Worker // `std::nullopt` iff offset > size.
splitOffSpan104*38e8c45fSAndroid Build Coastguard Worker std::optional<Span<T>> splitOff(size_t offset) {
105*38e8c45fSAndroid Build Coastguard Worker if (offset > size) {
106*38e8c45fSAndroid Build Coastguard Worker return std::nullopt;
107*38e8c45fSAndroid Build Coastguard Worker }
108*38e8c45fSAndroid Build Coastguard Worker Span<T> rest = {data + offset, size - offset};
109*38e8c45fSAndroid Build Coastguard Worker size = offset;
110*38e8c45fSAndroid Build Coastguard Worker return rest;
111*38e8c45fSAndroid Build Coastguard Worker }
112*38e8c45fSAndroid Build Coastguard Worker
113*38e8c45fSAndroid Build Coastguard Worker // Returns nullopt if the byte size of `this` isn't evenly divisible by sizeof(U).
114*38e8c45fSAndroid Build Coastguard Worker template <typename U>
reinterpretSpan115*38e8c45fSAndroid Build Coastguard Worker std::optional<Span<U>> reinterpret() const {
116*38e8c45fSAndroid Build Coastguard Worker // Only allow casting from bytes for simplicity.
117*38e8c45fSAndroid Build Coastguard Worker static_assert(std::is_same_v<std::remove_const_t<T>, uint8_t>);
118*38e8c45fSAndroid Build Coastguard Worker if (size % sizeof(U) != 0) {
119*38e8c45fSAndroid Build Coastguard Worker return std::nullopt;
120*38e8c45fSAndroid Build Coastguard Worker }
121*38e8c45fSAndroid Build Coastguard Worker return Span<U>{reinterpret_cast<U*>(data), size / sizeof(U)};
122*38e8c45fSAndroid Build Coastguard Worker }
123*38e8c45fSAndroid Build Coastguard Worker };
124*38e8c45fSAndroid Build Coastguard Worker
125*38e8c45fSAndroid Build Coastguard Worker // Converts binary data into a hexString.
126*38e8c45fSAndroid Build Coastguard Worker //
127*38e8c45fSAndroid Build Coastguard Worker // Hex values are printed in order, e.g. 0xDEAD will result in 'adde' because
128*38e8c45fSAndroid Build Coastguard Worker // Android is little-endian.
129*38e8c45fSAndroid Build Coastguard Worker LIBBINDER_INTERNAL_EXPORTED std::string HexString(const void* bytes, size_t len);
130*38e8c45fSAndroid Build Coastguard Worker
131*38e8c45fSAndroid Build Coastguard Worker // Converts any std::chrono duration to the number of milliseconds
132*38e8c45fSAndroid Build Coastguard Worker template <class Rep, class Period>
to_ms(std::chrono::duration<Rep,Period> duration)133*38e8c45fSAndroid Build Coastguard Worker uint64_t to_ms(std::chrono::duration<Rep, Period> duration) {
134*38e8c45fSAndroid Build Coastguard Worker return std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
135*38e8c45fSAndroid Build Coastguard Worker }
136*38e8c45fSAndroid Build Coastguard Worker
137*38e8c45fSAndroid Build Coastguard Worker } // namespace android
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