35,32 → 35,153 |
#include <arch/barrier.h> |
#include <arch.h> |
#include <preemption.h> |
#include <proc/thread.h> |
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#define RCU_MAX_I 1000 |
#define READER_THREADS 10 |
#define WRITER_THREADS 10 |
#define THREADS_SLEEP_LENGTH (uint32_t)50 |
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bool gquiet; |
volatile bool called; |
volatile bool finished; |
typedef struct data_struc { |
int number; |
struct data_struc* next; |
} data_t; |
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static void callback(void* data) |
data_t* first; |
SPINLOCK_INITIALIZE(write_lock); |
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static void reader(void* a) |
{ |
a = (a); |
data_t* cur; |
int i = 0; |
while (true) |
{ |
i = 0; |
rcu_read_lock(); |
for (cur = rcu_dereference_pointer(first).next; cur != first; cur = cur->next) { |
i += rcu_dereference_pointer(cur).number; |
} |
rcu_read_unlock(); |
thread_usleep(THREADS_SLEEP_LENGTH); |
if (i>RCU_MAX_I || finished) |
{ |
printf("@"); |
break; |
} |
} |
finished = true; |
} |
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static void writer(void* a) |
{ |
a = (a); |
data_t* cur; |
data_t* newdata, *oldata; |
rcu_callback_list_t* rcudata; |
int i = 0; |
printf("a1 "); |
rcudata = malloc(sizeof(rcu_callback_list_t),0); |
while (true) |
{ |
i = rcu_dereference_pointer(first).number; |
rcu_read_lock(); |
printf("a2 "); |
for (cur = rcu_dereference_pointer(first).next; cur != first; cur = rcu_dereference_pointer(cur).next) { |
i += rcu_dereference_pointer(cur).number; |
} |
rcu_read_unlock(); |
if (!gquiet) |
printf("callback called\n"); |
called = true; |
printf("i%d ",i); |
if (i>RCU_MAX_I || finished) |
{ |
printf("!"); |
break; |
} |
printf("a2b "); |
thread_usleep(THREADS_SLEEP_LENGTH); |
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printf("a3 "); |
newdata = malloc(sizeof(data_t),0); |
printf("a4 "); |
rcu_read_lock(); |
//prepend a new member |
spinlock_lock(&write_lock); |
printf("a5 "); |
newdata->number = (i/10)+1; |
oldata = first; |
newdata->next = first; |
rcu_assign_pointer(first, newdata); |
printf("a6 "); |
rcu_sync_callback(&rcu_callback_free, oldata, rcudata); |
spinlock_unlock(&write_lock); |
printf("a7 "); |
rcu_read_unlock(); |
thread_usleep(THREADS_SLEEP_LENGTH); |
printf("a8 "); |
if (!gquiet) |
printf(".",i); |
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rcu_read_lock(); |
for (cur = rcu_dereference_pointer(first).next; rcu_dereference_pointer(cur).number % 5 != 4 && cur != first; cur = rcu_dereference_pointer(cur).next) { |
} |
if (cur != first){ |
//delete the cur->next |
spinlock_lock(&write_lock); |
oldata = rcu_dereference_pointer(cur).next; |
newdata->next = rcu_dereference_pointer(rcu_dereference_pointer(cur).next).next; |
rcu_assign_pointer(rcu_dereference_pointer(cur).next, newdata); |
rcu_sync_callback(&rcu_callback_free, oldata, rcudata); |
spinlock_unlock(&write_lock); |
if (!gquiet) |
printf(", ",i); |
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} |
rcu_read_unlock(); |
thread_usleep(THREADS_SLEEP_LENGTH); |
} |
finished = true; |
} |
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char * test_rcu1(bool quiet) |
{ |
gquiet = quiet; |
called = false; |
int* p; |
rcu_read_lock(); |
rcu_assign_pointer(p,malloc(sizeof(int),0)); |
if (!quiet) |
printf("p:%x\n",rcu_dereference_pointer(p)); |
rcu_read_unlock(); |
rcu_sync_callback(&callback, NULL); |
if (!quiet) |
printf("Callback scheduled\n"); |
// while(!called); |
rcu_synchronize(); |
if (!quiet) |
printf("Synchronized\n"); |
data_t* cur, *oldata; |
int i; |
thread_t* t; |
thread_t** threads; |
first = malloc(sizeof(data_t),0); |
first->number = 10; |
first->next = first; |
threads = malloc(sizeof(thread_t*),0); |
finished = false; |
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for(i = 0; i< WRITER_THREADS; i++) { |
threads[i]=t=thread_create(writer,NULL, TASK, 0, "writerthread", false ); |
if (t != NULL) |
thread_ready(t); |
} |
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for(i = 0; i< READER_THREADS; i++) { |
threads[WRITER_THREADS+i]=t=thread_create(reader,NULL, TASK, 0, "readerthread", false ); |
if (t != NULL) |
thread_ready(t); |
} |
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for (i=0;i<WRITER_THREADS+READER_THREADS;i++) |
thread_join(threads[i]); |
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for(cur=first->next;cur->next!=first;) { |
oldata = cur->next; |
free(cur); |
cur = oldata; |
} |
free(first); |
return NULL; |
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} |