293 lines
10 KiB
C++
293 lines
10 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/memory/fifo_buffer.h"
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#include <string.h>
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#include "test/gtest.h"
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namespace rtc {
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TEST(FifoBufferTest, TestAll) {
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const size_t kSize = 16;
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const char in[kSize * 2 + 1] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
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char out[kSize * 2];
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void* p;
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const void* q;
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size_t bytes;
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FifoBuffer buf(kSize);
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// Test assumptions about base state
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EXPECT_EQ(SS_OPEN, buf.GetState());
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EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
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EXPECT_TRUE(nullptr != buf.GetWriteBuffer(&bytes));
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EXPECT_EQ(kSize, bytes);
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buf.ConsumeWriteBuffer(0);
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// Try a full write
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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// Try a write that should block
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EXPECT_EQ(SR_BLOCK, buf.Write(in, kSize, &bytes, nullptr));
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// Try a full read
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize));
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// Try a read that should block
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EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
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// Try a too-big write
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize * 2, &bytes, nullptr));
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EXPECT_EQ(bytes, kSize);
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// Try a too-big read
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 2, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize));
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// Try some small writes and reads
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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// Try wraparound reads and writes in the following pattern
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// WWWWWWWWWWWW.... 0123456789AB....
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// RRRRRRRRXXXX.... ........89AB....
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// WWWW....XXXXWWWW 4567....89AB0123
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// XXXX....RRRRXXXX 4567........0123
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// XXXXWWWWWWWWXXXX 4567012345670123
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// RRRRXXXXXXXXRRRR ....01234567....
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// ....RRRRRRRR.... ................
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize * 3 / 4, &bytes, nullptr));
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EXPECT_EQ(kSize * 3 / 4, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 4, &bytes, nullptr));
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EXPECT_EQ(kSize / 4, bytes);
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EXPECT_EQ(0, memcmp(in + kSize / 2, out, kSize / 4));
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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// Use GetWriteBuffer to reset the read_position for the next tests
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buf.GetWriteBuffer(&bytes);
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buf.ConsumeWriteBuffer(0);
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// Try using GetReadData to do a full read
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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q = buf.GetReadData(&bytes);
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EXPECT_TRUE(nullptr != q);
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(q, in, kSize));
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buf.ConsumeReadData(kSize);
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EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
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// Try using GetReadData to do some small reads
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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q = buf.GetReadData(&bytes);
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EXPECT_TRUE(nullptr != q);
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(q, in, kSize / 2));
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buf.ConsumeReadData(kSize / 2);
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q = buf.GetReadData(&bytes);
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EXPECT_TRUE(nullptr != q);
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(q, in + kSize / 2, kSize / 2));
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buf.ConsumeReadData(kSize / 2);
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EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
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// Try using GetReadData in a wraparound case
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// WWWWWWWWWWWWWWWW 0123456789ABCDEF
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// RRRRRRRRRRRRXXXX ............CDEF
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// WWWWWWWW....XXXX 01234567....CDEF
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// ............RRRR 01234567........
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// RRRRRRRR........ ................
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 3 / 4, &bytes, nullptr));
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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q = buf.GetReadData(&bytes);
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EXPECT_TRUE(nullptr != q);
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EXPECT_EQ(kSize / 4, bytes);
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EXPECT_EQ(0, memcmp(q, in + kSize * 3 / 4, kSize / 4));
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buf.ConsumeReadData(kSize / 4);
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q = buf.GetReadData(&bytes);
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EXPECT_TRUE(nullptr != q);
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EXPECT_EQ(kSize / 2, bytes);
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EXPECT_EQ(0, memcmp(q, in, kSize / 2));
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buf.ConsumeReadData(kSize / 2);
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// Use GetWriteBuffer to reset the read_position for the next tests
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buf.GetWriteBuffer(&bytes);
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buf.ConsumeWriteBuffer(0);
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// Try using GetWriteBuffer to do a full write
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p = buf.GetWriteBuffer(&bytes);
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EXPECT_TRUE(nullptr != p);
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EXPECT_EQ(kSize, bytes);
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memcpy(p, in, kSize);
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buf.ConsumeWriteBuffer(kSize);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize));
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// Try using GetWriteBuffer to do some small writes
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p = buf.GetWriteBuffer(&bytes);
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EXPECT_TRUE(nullptr != p);
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EXPECT_EQ(kSize, bytes);
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memcpy(p, in, kSize / 2);
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buf.ConsumeWriteBuffer(kSize / 2);
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p = buf.GetWriteBuffer(&bytes);
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EXPECT_TRUE(nullptr != p);
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EXPECT_EQ(kSize / 2, bytes);
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memcpy(p, in + kSize / 2, kSize / 2);
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buf.ConsumeWriteBuffer(kSize / 2);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize));
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// Try using GetWriteBuffer in a wraparound case
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// WWWWWWWWWWWW.... 0123456789AB....
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// RRRRRRRRXXXX.... ........89AB....
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// ........XXXXWWWW ........89AB0123
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// WWWW....XXXXXXXX 4567....89AB0123
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// RRRR....RRRRRRRR ................
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize * 3 / 4, &bytes, nullptr));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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p = buf.GetWriteBuffer(&bytes);
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EXPECT_TRUE(nullptr != p);
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EXPECT_EQ(kSize / 4, bytes);
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memcpy(p, in, kSize / 4);
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buf.ConsumeWriteBuffer(kSize / 4);
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p = buf.GetWriteBuffer(&bytes);
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EXPECT_TRUE(nullptr != p);
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EXPECT_EQ(kSize / 2, bytes);
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memcpy(p, in + kSize / 4, kSize / 4);
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buf.ConsumeWriteBuffer(kSize / 4);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 3 / 4, &bytes, nullptr));
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EXPECT_EQ(kSize * 3 / 4, bytes);
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EXPECT_EQ(0, memcmp(in + kSize / 2, out, kSize / 4));
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EXPECT_EQ(0, memcmp(in, out + kSize / 4, kSize / 4));
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// Check that the stream is now empty
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EXPECT_EQ(SR_BLOCK, buf.Read(out, kSize, &bytes, nullptr));
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// Try growing the buffer
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_TRUE(buf.SetCapacity(kSize * 2));
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EXPECT_EQ(SR_SUCCESS, buf.Write(in + kSize, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize * 2, &bytes, nullptr));
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EXPECT_EQ(kSize * 2, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize * 2));
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// Try shrinking the buffer
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_TRUE(buf.SetCapacity(kSize));
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EXPECT_EQ(SR_BLOCK, buf.Write(in, kSize, &bytes, nullptr));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize, &bytes, nullptr));
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EXPECT_EQ(kSize, bytes);
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EXPECT_EQ(0, memcmp(in, out, kSize));
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// Write to the stream, close it, read the remaining bytes
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, kSize / 2, &bytes, nullptr));
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buf.Close();
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EXPECT_EQ(SS_CLOSED, buf.GetState());
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EXPECT_EQ(SR_EOS, buf.Write(in, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(SR_SUCCESS, buf.Read(out, kSize / 2, &bytes, nullptr));
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EXPECT_EQ(0, memcmp(in, out, kSize / 2));
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EXPECT_EQ(SR_EOS, buf.Read(out, kSize / 2, &bytes, nullptr));
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}
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TEST(FifoBufferTest, FullBufferCheck) {
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FifoBuffer buff(10);
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buff.ConsumeWriteBuffer(10);
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size_t free;
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EXPECT_TRUE(buff.GetWriteBuffer(&free) != nullptr);
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EXPECT_EQ(0U, free);
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}
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TEST(FifoBufferTest, WriteOffsetAndReadOffset) {
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const size_t kSize = 16;
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const char in[kSize * 2 + 1] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
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char out[kSize * 2];
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FifoBuffer buf(kSize);
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// Write 14 bytes.
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EXPECT_EQ(SR_SUCCESS, buf.Write(in, 14, nullptr, nullptr));
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// Make sure data is in |buf|.
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size_t buffered;
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EXPECT_TRUE(buf.GetBuffered(&buffered));
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EXPECT_EQ(14u, buffered);
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// Read 10 bytes.
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buf.ConsumeReadData(10);
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// There should be now 12 bytes of available space.
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size_t remaining;
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EXPECT_TRUE(buf.GetWriteRemaining(&remaining));
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EXPECT_EQ(12u, remaining);
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// Write at offset 12, this should fail.
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EXPECT_EQ(SR_BLOCK, buf.WriteOffset(in, 10, 12, nullptr));
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// Write 8 bytes at offset 4, this wraps around the buffer.
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EXPECT_EQ(SR_SUCCESS, buf.WriteOffset(in, 8, 4, nullptr));
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// Number of available space remains the same until we call
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// ConsumeWriteBuffer().
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EXPECT_TRUE(buf.GetWriteRemaining(&remaining));
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EXPECT_EQ(12u, remaining);
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buf.ConsumeWriteBuffer(12);
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// There's 4 bytes bypassed and 4 bytes no read so skip them and verify the
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// 8 bytes written.
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size_t read;
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EXPECT_EQ(SR_SUCCESS, buf.ReadOffset(out, 8, 8, &read));
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EXPECT_EQ(8u, read);
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EXPECT_EQ(0, memcmp(out, in, 8));
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// There should still be 16 bytes available for reading.
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EXPECT_TRUE(buf.GetBuffered(&buffered));
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EXPECT_EQ(16u, buffered);
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// Read at offset 16, this should fail since we don't have that much data.
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EXPECT_EQ(SR_BLOCK, buf.ReadOffset(out, 10, 16, nullptr));
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}
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} // namespace rtc
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