20#define metapageaddr(field) \
21 ((char *) &vmem.metapage->field - (char *) vmem.metapage)
35 if (pipe(channel) < 0) {
36 for (
int j = 0;
j <
i;
j++) {
64 int fd =
open(path, O_RDWR | O_CREAT, 0600);
99 if (
map == MAP_FAILED) {
121#ifdef HAVE_CPP_THREADS
122 while (_lock.test_and_set()) {
124 bool empty = _owner < 0;
145#ifdef HAVE_CPP_THREADS
146 while (_lock.test_and_set()) {
171 printf(
"%2d: %ld",
i, vaddr);
174 printf(
"(%ld)", prev);
183 printf(
" -> %ld", vaddr);
185 if (prev != last_vaddr) {
186 printf(
"(%ld)", prev);
197 vaddr -= offsetof(
Block, data);
245 size_t alloc_size =
size + offsetof(
Block, data);
254 while (flevel >
level) {
257 assert((blockaddr & ((1 << flevel) - 1)) == 0);
262 vaddr_t blockaddr2 = blockaddr + (1 << (flevel - 1));
266 block2->
prev = blockaddr;
267 block->next = blockaddr2;
286 struct flock &lock_info,
size_t offset,
size_t len,
bool lock) {
287 lock_info.l_start =
offset;
288 lock_info.l_len = len;
290 lock_info.l_type = lock ? F_WRLCK : F_UNLCK;
295 struct flock lock_info;
297 fcntl(
fd, F_SETLKW, &lock_info);
301 struct flock lock_info;
303 fcntl(
fd, F_SETLKW, &lock_info);
380 if (lock && sigstate ==
Waiting) {
420 using namespace internals;
428 }
else if (pid == 0) {
542 if (!event->start_listen((
int) (n++))) {
548 event->stop_listen();
CanonicalForm map(const CanonicalForm &primElem, const Variable &alpha, const CanonicalForm &F, const Variable &beta)
map from to such that is mapped onto
int _waiting[internals::MAX_PROCESS+1]
bool start_wait(internals::ipc_signal_t sig=0)
internals::ipc_signal_t _signals[internals::MAX_PROCESS+1]
void init_flock_struct(struct flock &lock_info, size_t offset, size_t len, bool lock)
static ProcessInfo & process_info(int processno)
void lock_file(int fd, size_t offset, size_t len)
void vmem_free(vaddr_t vaddr)
Block * block_ptr(vaddr_t vaddr)
vaddr_t vmem_alloc(size_t size)
static void unlock_process(int processno)
static const size_t MAX_SEGMENTS
vaddr_t freelist[LOG2_SEGMENT_SIZE+1]
static const size_t SEGMENT_SIZE
static const size_t METABLOCK_SIZE
static void lock_process(int processno)
static const int LOG2_SEGMENT_SIZE
ipc_signal_t wait_signal(bool lock)
static const int MAX_PROCESS
ProcessInfo process_info[MAX_PROCESS]
static void lock_allocator()
static segaddr_t find_buddy(segaddr_t addr, int level)
ipc_signal_t check_signal(bool resume, bool lock)
void init_metapage(bool create)
void unlock_file(int fd, size_t offset, size_t len)
bool send_signal(int processno, ipc_signal_t sig, bool lock)
static int find_level(size_t size)
static void unlock_allocator()
static void print_freelists()
internals::Mutex FastLock
int status int void size_t count write
int status int void size_t count int const void size_t count open
void ensure_is_mapped(vaddr_t vaddr)
Block * block_ptr(vaddr_t vaddr)
size_t segment_no(vaddr_t vaddr)
void * mmap_segment(int seg)
VSeg segment(vaddr_t vaddr)
VSeg segments[MAX_SEGMENTS]
vaddr_t vaddr(size_t segno, segaddr_t addr)
segaddr_t segaddr(vaddr_t vaddr)
ProcessChannel channels[MAX_PROCESS]
Block * block_ptr(segaddr_t addr)
bool is_free(segaddr_t addr)
#define metapageaddr(field)