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authorPieter Wuille <pieter.wuille@gmail.com>2018-12-17 15:11:33 -0800
committerPieter Wuille <pieter.wuille@gmail.com>2019-01-16 16:34:56 -0800
commita1f252eda87356fa329c838a7bf569808489648f (patch)
tree0acb8aa71ee5c1a119cdc75b791d6542d7af0d8b /src/random.h
parent4ea8e50837a0932b31a241988fd68d6730a2048a (diff)
Sprinkle some sweet noexcepts over the RNG code
Diffstat (limited to 'src/random.h')
-rw-r--r--src/random.h28
1 files changed, 14 insertions, 14 deletions
diff --git a/src/random.h b/src/random.h
index 592f36a406..038e3ecd78 100644
--- a/src/random.h
+++ b/src/random.h
@@ -21,10 +21,10 @@
*
* Thread-safe.
*/
-void GetRandBytes(unsigned char* buf, int num);
-uint64_t GetRand(uint64_t nMax);
-int GetRandInt(int nMax);
-uint256 GetRandHash();
+void GetRandBytes(unsigned char* buf, int num) noexcept;
+uint64_t GetRand(uint64_t nMax) noexcept;
+int GetRandInt(int nMax) noexcept;
+uint256 GetRandHash() noexcept;
/**
* Gather entropy from various sources, feed it into the internal PRNG, and
@@ -34,7 +34,7 @@ uint256 GetRandHash();
*
* Thread-safe.
*/
-void GetStrongRandBytes(unsigned char* buf, int num);
+void GetStrongRandBytes(unsigned char* buf, int num) noexcept;
/**
* Sleep for 1ms, gather entropy from various sources, and feed them to the PRNG state.
@@ -78,10 +78,10 @@ private:
}
public:
- explicit FastRandomContext(bool fDeterministic = false);
+ explicit FastRandomContext(bool fDeterministic = false) noexcept;
/** Initialize with explicit seed (only for testing) */
- explicit FastRandomContext(const uint256& seed);
+ explicit FastRandomContext(const uint256& seed) noexcept;
// Do not permit copying a FastRandomContext (move it, or create a new one to get reseeded).
FastRandomContext(const FastRandomContext&) = delete;
@@ -92,7 +92,7 @@ public:
FastRandomContext& operator=(FastRandomContext&& from) noexcept;
/** Generate a random 64-bit integer. */
- uint64_t rand64()
+ uint64_t rand64() noexcept
{
if (bytebuf_size < 8) FillByteBuffer();
uint64_t ret = ReadLE64(bytebuf + 64 - bytebuf_size);
@@ -101,7 +101,7 @@ public:
}
/** Generate a random (bits)-bit integer. */
- uint64_t randbits(int bits) {
+ uint64_t randbits(int bits) noexcept {
if (bits == 0) {
return 0;
} else if (bits > 32) {
@@ -116,7 +116,7 @@ public:
}
/** Generate a random integer in the range [0..range). */
- uint64_t randrange(uint64_t range)
+ uint64_t randrange(uint64_t range) noexcept
{
--range;
int bits = CountBits(range);
@@ -130,19 +130,19 @@ public:
std::vector<unsigned char> randbytes(size_t len);
/** Generate a random 32-bit integer. */
- uint32_t rand32() { return randbits(32); }
+ uint32_t rand32() noexcept { return randbits(32); }
/** generate a random uint256. */
- uint256 rand256();
+ uint256 rand256() noexcept;
/** Generate a random boolean. */
- bool randbool() { return randbits(1); }
+ bool randbool() noexcept { return randbits(1); }
// Compatibility with the C++11 UniformRandomBitGenerator concept
typedef uint64_t result_type;
static constexpr uint64_t min() { return 0; }
static constexpr uint64_t max() { return std::numeric_limits<uint64_t>::max(); }
- inline uint64_t operator()() { return rand64(); }
+ inline uint64_t operator()() noexcept { return rand64(); }
};
/** More efficient than using std::shuffle on a FastRandomContext.