100   size_t pagesize = sysconf(_SC_PAGESIZE);  in TEST()  local
104   ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));  in TEST()
106   ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));  in TEST()
108   ASSERT_NE(-1, lseek(tf.fd, 3 * pagesize - sizeof(END_MSG), SEEK_SET));  in TEST()
113   void* map = mmap(nullptr, pagesize, PROT_READ, MAP_SHARED, tf.fd, pagesize);  in TEST()
119   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()
121   map = mmap(nullptr, pagesize, PROT_READ, MAP_SHARED, tf.fd, 2 * pagesize);  in TEST()
126   ASSERT_STREQ(END_MSG, data+pagesize-sizeof(END_MSG));  in TEST()
128   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()
136   size_t pagesize = sysconf(_SC_PAGESIZE);  in TEST()  local
140   ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));  in TEST()
142   ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));  in TEST()
144   ASSERT_NE(-1, lseek(tf.fd, 3 * pagesize - sizeof(END_MSG), SEEK_SET));  in TEST()
149   void* map = mmap(nullptr, pagesize, PROT_WRITE, MAP_SHARED, tf.fd, pagesize);  in TEST()
154   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()
157   map = mmap(nullptr, pagesize, PROT_WRITE, MAP_SHARED, tf.fd, 2 * pagesize);  in TEST()
162   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()
165   char buf[pagesize];  in TEST()
166   ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));  in TEST()
168   ASSERT_NE(-1, lseek(tf.fd, pagesize, SEEK_SET));  in TEST()
169   ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));  in TEST()
171   ASSERT_NE(-1, lseek(tf.fd, 2 * pagesize, SEEK_SET));  in TEST()
172   ASSERT_EQ(static_cast<ssize_t>(pagesize), read(tf.fd, buf, pagesize));  in TEST()
174   ASSERT_STREQ(END_MSG, buf+pagesize-sizeof(END_MSG));  in TEST()
179   size_t pagesize = sysconf(_SC_PAGESIZE);  in TEST()  local
180   char buf[pagesize];  in TEST()
183   ASSERT_EQ(static_cast<ssize_t>(pagesize), write(tempfile.fd, buf, pagesize));  in TEST()
184   void* map = mmap(nullptr, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, tempfile.fd, 0);  in TEST()
188   ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_NORMAL));  in TEST()
189   ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_SEQUENTIAL));  in TEST()
190   ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_RANDOM));  in TEST()
191   ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_WILLNEED));  in TEST()
193   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()
200   size_t pagesize = sysconf(_SC_PAGESIZE);  in TEST()  local
202   void* map = mmap(nullptr, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);  in TEST()
206   for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {  in TEST()
210   ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_DONTNEED));  in TEST()
213   for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {  in TEST()
217   ASSERT_EQ(0, munmap(map, pagesize));  in TEST()