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moved shared data into global variables, removed SMArg struct

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git-svn-id: svn://anubis/gvsu@167 45c1a28c-8058-47b2-ae61-ca45b979098e
This commit is contained in:
josh 2008-09-26 16:43:05 +00:00
parent 86e44617bf
commit c452c1eecb
1 changed files with 15 additions and 23 deletions
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38
cs677/pa2/threaded.cc
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@ -15,19 +15,15 @@ using namespace std;
#define eq(x, y) ( ( (x) == (y) ) || ( (x) == '?' ) || ( (y) == '?' ) )
typedef struct
{
vector<char> * s;
vector<char> * t;
int id;
void * matrix;
} SMArg;
void usage(char * prog);
void * calcSimMatrixThread(void * arg);
bool readFile(char * fileName, vector<char> & v);
pthread_barrier_t barrier;
int num_threads;
int * matrix;
vector<char> * s;
vector<char> * t;
/* Print basic usage information */
void usage(char * prog)
@ -39,7 +35,7 @@ void usage(char * prog)
int main(int argc, char * argv[])
{
vector<char> files[2];
int num_threads = 1;
num_threads = 1;
int file_to_read = 0;
for (int i = 1; i < argc; i++)
@ -64,19 +60,15 @@ int main(int argc, char * argv[])
if (file_to_read != 2)
usage(argv[0]);
s = &files[0];
t = &files[1];
pthread_t * threads = new pthread_t[num_threads];
int * similarityMatrix = new int[files[0].size() * files[1].size()];
matrix = new int[files[0].size() * files[1].size()];
pthread_barrier_init(&barrier, NULL, num_threads);
for (int i = 0; i < num_threads; i++)
{
SMArg * arg = new SMArg;
arg->s = &files[0];
arg->t = &files[1];
arg->id = i;
arg->matrix = similarityMatrix;
int ret = pthread_create(&threads[i], NULL, &calcSimMatrixThread, arg);
int ret = pthread_create(&threads[i], NULL, &calcSimMatrixThread, (void *) i);
if (ret)
{
cerr << "Error " << ret << " when creating thread!" << endl;
@ -91,6 +83,7 @@ int main(int argc, char * argv[])
pthread_barrier_destroy(&barrier);
delete[] matrix;
delete[] threads;
return 0;
}
@ -113,10 +106,10 @@ bool readFile(char * fileName, vector<char> & v)
/* Compute portions of the similarity matrix between two character arrays */
void * calcSimMatrixThread(void * arg)
{
SMArg * smarg = (SMArg *) arg;
int s_size = smarg->s->size();
int t_size = smarg->t->size();
int (*F)[s_size][t_size] = (int (*) [s_size][t_size]) smarg->matrix;
int id = (int) arg;
int s_size = s->size();
int t_size = t->size();
int (*F)[s_size][t_size] = (int (*) [s_size][t_size]) matrix;
int max_x = 0, max_y = 0, max_val = 0;
for (int i = 0; i < t_size; i++) /* set first row to 0's */
(*F)[0][i] = 0;
@ -132,7 +125,7 @@ void * calcSimMatrixThread(void * arg)
max(
(*F)[i][j-1] - 2,
(*F)[i-1][j-1] +
(eq(smarg->s->at(i), smarg->t->at(j)) ? 1 : -1)
(eq(s->at(i), t->at(j)) ? 1 : -1)
),
max(
(*F)[i-1][j] - 2,
@ -162,6 +155,5 @@ void * calcSimMatrixThread(void * arg)
cout << "Maximum value is " << max_val << " at position ("
<< max_x << ", " << max_y << ")" << endl;
delete smarg;
return NULL;
}