#include <stdatomic.h>
#include <unrelacy.h>
+#include <common.h>
+/**
+ @Begin
+ @Class_begin
+ @End
+*/
template <typename t_element, size_t t_size>
struct mpmc_boundq_1_alt
{
mpmc_boundq_1_alt()
{
+ /**
+ @Begin
+ @Entry_point
+ @End
+ */
m_rdwr = 0;
m_read = 0;
m_written = 0;
/**
- @Global_define:
+ @Begin
@Options:
LANG = CPP;
CLASS = mpmc_boundq_1_alt;
+ @Global_define:
@DeclareStruct:
typedef struct elem {
t_element *pos;
- boolean written;
+ bool written;
thread_id_t tid;
+ thread_id_t fetch_tid;
call_id_t id;
} elem;
@DeclareVar:
e->written = false;
e->id = id;
e->tid = tid;
+ e->fetch_tid = -1;
}
@DefineFunc:
elem* get_elem_by_pos(t_element *pos) {
}
return NULL;
}
+ @DefineFunc:
+ void show_list() {
+ model_print("Status:\n");
+ for (int i = 0; i < size(list); i++) {
+ elem *e = (elem*) elem_at_index(list, i);
+ model_print("%d: pos %d, written %d, tid %d, fetch_tid %d, call_id %d\n", i, e->pos, e->written, e->tid, e->fetch_tid, e->id);
+ }
+ }
@DefineFunc:
elem* get_elem_by_tid(thread_id_t tid) {
for (int i = 0; i < size(list); i++) {
}
return NULL;
}
+ @DefineFunc:
+ elem* get_elem_by_fetch_tid(thread_id_t fetch_tid) {
+ for (int i = 0; i < size(list); i++) {
+ elem *e = (elem*) elem_at_index(list, i);
+ if (e->fetch_tid== fetch_tid) {
+ return e;
+ }
+ }
+ return NULL;
+ }
@DefineFunc:
int elem_idx_by_pos(t_element *pos) {
for (int i = 0; i < size(list); i++) {
}
return -1;
}
+ @DefineFunc:
+ int elem_idx_by_fetch_tid(thread_id_t fetch_tid) {
+ for (int i = 0; i < size(list); i++) {
+ elem *existing = (elem*) elem_at_index(list, i);
+ if (fetch_tid == existing->fetch_tid) {
+ return i;
+ }
+ }
+ return -1;
+ }
+ @DefineFunc:
+ int elem_num(t_element *pos) {
+ int cnt = 0;
+ for (int i = 0; i < size(list); i++) {
+ elem *existing = (elem*) elem_at_index(list, i);
+ if (pos == existing->pos) {
+ cnt++;
+ }
+ }
+ return cnt;
+ }
@DefineFunc:
call_id_t prepare_id() {
- return get_and_inc(tag);
+ call_id_t res = get_and_inc(tag);
+ model_print("prepare_id: %d\n", res);
+ return res;
}
@DefineFunc:
bool prepare_check(t_element *pos, thread_id_t tid) {
- elem *e = get_elem_by_tid(tid);
+ show_list();
+ elem *e = get_elem_by_pos(pos);
+ model_print("prepare_check: e %d\n", e);
return NULL == e;
}
@DefineFunc:
void prepare(call_id_t id, t_element *pos, thread_id_t tid) {
- call_id_t id = get_and_inc(tag);
+ model_print("prepare: id %d, pos %d, tid %d\n", id, pos, tid);
elem *e = new_elem(pos, id, tid);
push_back(list, e);
}
@DefineFunc:
call_id_t publish_id(thread_id_t tid) {
elem *e = get_elem_by_tid(tid);
+ model_print("publish_id: id %d\n", e == NULL ? 0 : e->id);
if (NULL == e)
return DEFAULT_CALL_ID;
return e->id;
}
@DefineFunc:
bool publish_check(thread_id_t tid) {
+ show_list();
elem *e = get_elem_by_tid(tid);
+ model_print("publish_check: tid %d\n", tid);
if (NULL == e)
return false;
- return e->written;
+ if (elem_num(e->pos) > 1)
+ return false;
+ return !e->written;
}
@DefineFunc:
void publish(thread_id_t tid) {
+ model_print("publish: tid %d\n", tid);
elem *e = get_elem_by_tid(tid);
e->written = true;
}
@DefineFunc:
call_id_t fetch_id(t_element *pos) {
elem *e = get_elem_by_pos(pos);
+ model_print("fetch_id: id %d\n", e == NULL ? 0 : e->id);
if (NULL == e)
return DEFAULT_CALL_ID;
return e->id;
}
@DefineFunc:
bool fetch_check(t_element *pos) {
- int idx = elem_idx_by_pos(pos);
- if (idx == -1)
+ show_list();
+ if (pos == NULL) return true;
+ elem *e = get_elem_by_pos(pos);
+ model_print("fetch_check: pos %d, e %d\n", pos, e);
+ if (e == NULL) return false;
+ if (elem_num(e->pos) > 1)
return false;
- else
- return true;
+ return true;
}
@DefineFunc:
- void fetch(t_element *pos) {
- int idx = elem_idx_by_pos(pos);
- if (idx == -1)
- return;
- remove_at_index(list, idx);
+ void fetch(t_element *pos, thread_id_t tid) {
+ if (pos == NULL) return;
+ elem *e = (elem*) get_elem_by_pos(pos);
+ model_print("fetch: pos %d, tid %d\n", pos, tid);
+ // Remember the thread that fetches the position
+ e->fetch_tid = tid;
}
@DefineFunc:
bool consume_check(thread_id_t tid) {
- elem *e = get_elem_by_tid(tid);
+ show_list();
+ elem *e = get_elem_by_fetch_tid(tid);
+ model_print("consume_check: tid %d, e %d\n", tid, e);
if (NULL == e)
return false;
+ if (elem_num(e->pos) > 1)
+ return false;
return e->written;
}
@DefineFunc:
call_id_t consume_id(thread_id_t tid) {
- elem *e = get_elem_by_tid(tid);
+ elem *e = get_elem_by_fetch_tid(tid);
+ model_print("consume_id: id %d\n", e == NULL ? 0 : e->id);
if (NULL == e)
return DEFAULT_CALL_ID;
return e->id;
}
@DefineFunc:
void consume(thread_id_t tid) {
- int idx = elem_idx_by_tid(tid);
+ model_print("consume: tid %d\n", tid);
+ int idx = elem_idx_by_fetch_tid(tid);
if (idx == -1)
return;
remove_at_index(list, idx);
/**
@Begin
@Interface: Fetch
- @Commit_point_set: Fetch_Point
+ @Commit_point_set: Fetch_Empty_Point | Fetch_Succ_Point
@ID: fetch_id(__RET__)
@Check:
fetch_check(__RET__)
@Action:
- fetch(__RET__);
+ fetch(__RET__, __TID__);
@End
*/
t_element * read_fetch() {
unsigned int rdwr = m_rdwr.load(mo_acquire);
+ /**
+ @Begin
+ @Potential_commit_point_define: true
+ @Label: Fetch_Potential_Point
+ @End
+ */
unsigned int rd,wr;
for(;;) {
rd = (rdwr>>16) & 0xFFFF;
wr = rdwr & 0xFFFF;
if ( wr == rd ) { // empty
+ /**
+ @Begin
+ @Commit_point_define: true
+ @Potential_commit_point_label: Fetch_Potential_Point
+ @Label: Fetch_Empty_Point
+ @End
+ */
return false;
}
-
- if ( m_rdwr.compare_exchange_weak(rdwr,rdwr+(1<<16),mo_acq_rel) )
+
+ bool succ = m_rdwr.compare_exchange_weak(rdwr,rdwr+(1<<16),mo_acq_rel);
+ if (succ)
break;
else
thrd_yield();
while ( (m_written.load(mo_acquire) & 0xFFFF) != wr ) {
thrd_yield();
}
+ /**
+ @Begin
+ @Commit_point_define: true
+ @Potential_commit_point_label: Fetch_Potential_Point
+ @Label: Fetch_Succ_Point
+ @End
+ */
t_element * p = & ( m_array[ rd % t_size ] );
*/
void read_consume() {
m_read.fetch_add(1,mo_release);
+ /**
+ @Begin
+ @Commit_point_define_check: true
+ @Label: Consume_Point
+ @End
+ */
}
//-----------------------------------------------------
/**
@Begin
@Interface: Prepare
- @Commit_point_set: Prepare_Point
- @ID: prepare_id(__RET__)
+ @Commit_point_set: Prepare_Full_Point | Prepare_Succ_Point
+ @ID: prepare_id()
@Check:
- prepare_check(__RET__)
+ prepare_check(__RET__, __TID__)
@Action:
- prepare(__RET__);
+ prepare(__ID__, __RET__, __TID__);
@End
*/
t_element * write_prepare() {
unsigned int rdwr = m_rdwr.load(mo_acquire);
+ /**
+ @Begin
+ @Potential_commit_point_define: true
+ @Label: Prepare_Potential_Point
+ @End
+ */
unsigned int rd,wr;
for(;;) {
rd = (rdwr>>16) & 0xFFFF;
wr = rdwr & 0xFFFF;
- if ( wr == ((rd + t_size)&0xFFFF) ) // full
+ if ( wr == ((rd + t_size)&0xFFFF) ) { // full
+ /**
+ @Begin
+ @Commit_point_define: true
+ @Potential_commit_point_label: Prepare_Potential_Point
+ @Label: Prepare_Full_Point
+ @End
+ */
return NULL;
+ }
if ( m_rdwr.compare_exchange_weak(rdwr,(rd<<16) | ((wr+1)&0xFFFF),mo_acq_rel) )
break;
while ( (m_read.load(mo_acquire) & 0xFFFF) != rd ) {
thrd_yield();
}
-
+ /**
+ @Begin
+ @Commit_point_define: true
+ @Potential_commit_point_label: Prepare_Potential_Point
+ @Label: Prepare_Succ_Point
+ @End
+ */
t_element * p = & ( m_array[ wr % t_size ] );
void write_publish()
{
m_written.fetch_add(1,mo_release);
+ /**
+ @Begin
+ @Commit_point_define_check: true
+ @Label: Publish_Point
+ @End
+ */
}
//-----------------------------------------------------
};
+/**
+ @Begin
+ @Class_end
+ @End
+*/
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