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XrdFfsQueue.cc File Reference
#include "XrdFfs/XrdFfsQueue.hh"
#include <cstdlib>
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Functions

unsigned int XrdFfsQueue_count_tasks ()
 
int XrdFfsQueue_count_workers ()
 
struct XrdFfsQueueTasksXrdFfsQueue_create_task (void *(*func)(void *), void **args, short initstat)
 
int XrdFfsQueue_create_workers (int n)
 
struct XrdFfsQueueTasksXrdFfsQueue_dequeue ()
 
void XrdFfsQueue_enqueue (struct XrdFfsQueueTasks *task)
 
void XrdFfsQueue_free_task (struct XrdFfsQueueTasks *task)
 
int XrdFfsQueue_remove_workers (int n)
 
void XrdFfsQueue_wait_task (struct XrdFfsQueueTasks *task)
 
void * XrdFfsQueue_worker (void *x)
 

Variables

unsigned int XrdFfsQueueNext_task_id = 0
 
unsigned short XrdFfsQueueNworkers = 0
 
pthread_cond_t XrdFfsQueueTaskque_cond = PTHREAD_COND_INITIALIZER
 
struct XrdFfsQueueTasksXrdFfsQueueTaskque_head = NULL
 
pthread_mutex_t XrdFfsQueueTaskque_mutex = PTHREAD_MUTEX_INITIALIZER
 
struct XrdFfsQueueTasksXrdFfsQueueTaskque_tail = NULL
 
unsigned int XrdFfsQueueWorker_id = 0
 
pthread_mutex_t XrdFfsQueueWorker_mutex
 

Function Documentation

◆ XrdFfsQueue_count_tasks()

unsigned int XrdFfsQueue_count_tasks ( )

Definition at line 131 of file XrdFfsQueue.cc.

132{
133 unsigned int que_len = 0;
134 pthread_mutex_lock(&XrdFfsQueueTaskque_mutex);
135 if (XrdFfsQueueTaskque_head != NULL && XrdFfsQueueTaskque_tail != NULL) {
138 else
139// this is wrong:
140// que_len = (unsigned int)2147483647 - (XrdFfsQueueTaskque_head->id - XrdFfsQueueTaskque_tail->id) + 1;
141
142//not accepted by c89
143// que_len = (unsigned int)4294967295 - (XrdFfsQueueTaskque_head->id - XrdFfsQueueTaskque_tail->id) + 1;
144
145//this is not quite correct, but I imagine that the queue will never by so long >= 2147483647
146 que_len = (unsigned int)2147483647 - (XrdFfsQueueTaskque_head->id - XrdFfsQueueTaskque_tail->id) + 1+(unsigned int)2147483647+1;
147 }
148 pthread_mutex_unlock(&XrdFfsQueueTaskque_mutex);
149 return que_len;
150}
struct XrdFfsQueueTasks * XrdFfsQueueTaskque_head
pthread_mutex_t XrdFfsQueueTaskque_mutex
struct XrdFfsQueueTasks * XrdFfsQueueTaskque_tail
unsigned int id

References XrdFfsQueueTasks::id, XrdFfsQueueTaskque_head, XrdFfsQueueTaskque_mutex, and XrdFfsQueueTaskque_tail.

Referenced by XrdFfsPosix_statall().

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◆ XrdFfsQueue_count_workers()

int XrdFfsQueue_count_workers ( )

Definition at line 254 of file XrdFfsQueue.cc.

255{
256 int i;
257 pthread_mutex_lock(&XrdFfsQueueWorker_mutex);
259 pthread_mutex_unlock(&XrdFfsQueueWorker_mutex);
260 return i;
261}
pthread_mutex_t XrdFfsQueueWorker_mutex
unsigned short XrdFfsQueueNworkers

References XrdFfsQueueNworkers, and XrdFfsQueueWorker_mutex.

Referenced by XrdFfsMisc_xrd_init().

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◆ XrdFfsQueue_create_task()

struct XrdFfsQueueTasks * XrdFfsQueue_create_task ( void *(* func )(void *),
void ** args,
short initstat )

Definition at line 97 of file XrdFfsQueue.cc.

98{
99 struct XrdFfsQueueTasks *task = (struct XrdFfsQueueTasks*) malloc(sizeof(struct XrdFfsQueueTasks));
100 task->func = func;
101 task->args = args;
102 task->done = ( (initstat == -1)? -1 : 0); /* -1 means this task is meant to kill a worker thread */
103
104 pthread_mutex_init(&task->mutex, NULL);
105 pthread_cond_init(&task->cond, NULL);
106
108 return task;
109}
void XrdFfsQueue_enqueue(struct XrdFfsQueueTasks *task)
pthread_cond_t cond
pthread_mutex_t mutex
void *(* func)(void *)

References XrdFfsQueueTasks::args, XrdFfsQueueTasks::cond, XrdFfsQueueTasks::done, XrdFfsQueueTasks::func, XrdFfsQueueTasks::mutex, and XrdFfsQueue_enqueue().

Referenced by XrdFfsPosix_deleteall(), XrdFfsPosix_readdirall(), XrdFfsPosix_statall(), XrdFfsPosix_statvfsall(), and XrdFfsQueue_remove_workers().

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◆ XrdFfsQueue_create_workers()

int XrdFfsQueue_create_workers ( int n)

Definition at line 192 of file XrdFfsQueue.cc.

193{
194 int i, rc, *id;
195 pthread_t *thread;
196 pthread_attr_t attr;
197 size_t stacksize = 2*1024*1024;
198
199 pthread_attr_init(&attr);
200 pthread_attr_setstacksize(&attr, stacksize);
201 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
202
203 pthread_mutex_lock(&XrdFfsQueueWorker_mutex);
204 for (i = 0; i < n; i++)
205 {
206 id = (int*) malloc(sizeof(int));
207 *id = XrdFfsQueueWorker_id++;
208 thread = (pthread_t*) malloc(sizeof(pthread_t));
209 if (thread == NULL)
210 {
212 break;
213 }
214 rc = pthread_create(thread, &attr, XrdFfsQueue_worker, id);
215 if (rc != 0)
216 {
218 break;
219 }
220 pthread_detach(*thread);
221 free(thread);
222 }
223 pthread_attr_destroy(&attr);
225 pthread_mutex_unlock(&XrdFfsQueueWorker_mutex);
226 return i;
227}
unsigned int XrdFfsQueueWorker_id
void * XrdFfsQueue_worker(void *x)

References XrdFfsQueueTasks::id, XrdFfsQueue_worker(), XrdFfsQueueNworkers, XrdFfsQueueWorker_id, and XrdFfsQueueWorker_mutex.

Referenced by XrdFfsMisc_xrd_init().

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◆ XrdFfsQueue_dequeue()

struct XrdFfsQueueTasks * XrdFfsQueue_dequeue ( )

Definition at line 70 of file XrdFfsQueue.cc.

71{
72 struct XrdFfsQueueTasks *head;
73 while (pthread_mutex_lock(&XrdFfsQueueTaskque_mutex) == 0)
74 if (XrdFfsQueueTaskque_head == NULL)
75 {
77 pthread_mutex_unlock(&XrdFfsQueueTaskque_mutex);
78 }
79 else
80 break;
81
84
85 head->next = NULL;
86 head->prev = NULL;
87
88 if (XrdFfsQueueTaskque_head == NULL)
90
91 pthread_mutex_unlock(&XrdFfsQueueTaskque_mutex);
92 return head;
93}
pthread_cond_t XrdFfsQueueTaskque_cond
struct XrdFfsQueueTasks * prev
struct XrdFfsQueueTasks * next

References XrdFfsQueueTasks::next, XrdFfsQueueTasks::prev, XrdFfsQueueTaskque_cond, XrdFfsQueueTaskque_head, XrdFfsQueueTaskque_mutex, and XrdFfsQueueTaskque_tail.

Referenced by XrdFfsQueue_worker().

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◆ XrdFfsQueue_enqueue()

void XrdFfsQueue_enqueue ( struct XrdFfsQueueTasks * task)

Definition at line 45 of file XrdFfsQueue.cc.

46{
47 pthread_mutex_lock(&XrdFfsQueueTaskque_mutex);
48
49 task->id = XrdFfsQueueNext_task_id + 1;
51 if (XrdFfsQueueTaskque_tail == NULL)
52 {
55 task->next = NULL;
56 pthread_cond_broadcast(&XrdFfsQueueTaskque_cond);
57 }
58 else
59 {
61 task->next = NULL;
64 }
65
66 pthread_mutex_unlock(&XrdFfsQueueTaskque_mutex);
67 return;
68}
unsigned int XrdFfsQueueNext_task_id

References XrdFfsQueueTasks::id, XrdFfsQueueTasks::next, XrdFfsQueueTasks::prev, XrdFfsQueueNext_task_id, XrdFfsQueueTaskque_cond, XrdFfsQueueTaskque_head, XrdFfsQueueTaskque_mutex, and XrdFfsQueueTaskque_tail.

Referenced by XrdFfsQueue_create_task().

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◆ XrdFfsQueue_free_task()

void XrdFfsQueue_free_task ( struct XrdFfsQueueTasks * task)

Definition at line 111 of file XrdFfsQueue.cc.

112{
113 pthread_mutex_destroy(&task->mutex);
114 pthread_cond_destroy(&task->cond);
115 task->func = NULL;
116 task->args = NULL;
117 task->next = NULL;
118 task->prev = NULL;
119 free(task);
120 task = NULL;
121}

References XrdFfsQueueTasks::args, XrdFfsQueueTasks::cond, XrdFfsQueueTasks::func, XrdFfsQueueTasks::mutex, XrdFfsQueueTasks::next, and XrdFfsQueueTasks::prev.

Referenced by XrdFfsQueue_remove_workers().

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◆ XrdFfsQueue_remove_workers()

int XrdFfsQueue_remove_workers ( int n)

Definition at line 229 of file XrdFfsQueue.cc.

230{
231 int i;
232 struct XrdFfsQueueTasks *task;
233
234 pthread_mutex_lock(&XrdFfsQueueWorker_mutex);
235 if (XrdFfsQueueNworkers == 0)
236 n = 0;
237 else if (n > XrdFfsQueueNworkers)
238 {
241 }
242 else
244 for (i = 0; i < n; i++)
245 {
246 task = XrdFfsQueue_create_task(NULL, NULL, -1);
249 }
250 pthread_mutex_unlock(&XrdFfsQueueWorker_mutex);
251 return n;
252}
void XrdFfsQueue_free_task(struct XrdFfsQueueTasks *task)
struct XrdFfsQueueTasks * XrdFfsQueue_create_task(void *(*func)(void *), void **args, short initstat)
void XrdFfsQueue_wait_task(struct XrdFfsQueueTasks *task)

References XrdFfsQueue_create_task(), XrdFfsQueue_free_task(), XrdFfsQueue_wait_task(), XrdFfsQueueNworkers, and XrdFfsQueueWorker_mutex.

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◆ XrdFfsQueue_wait_task()

void XrdFfsQueue_wait_task ( struct XrdFfsQueueTasks * task)

Definition at line 123 of file XrdFfsQueue.cc.

124{
125 pthread_mutex_lock(&task->mutex);
126 if (task->done != 1)
127 pthread_cond_wait(&task->cond, &task->mutex);
128 pthread_mutex_unlock(&task->mutex);
129}

References XrdFfsQueueTasks::cond, XrdFfsQueueTasks::done, and XrdFfsQueueTasks::mutex.

Referenced by XrdFfsQueue_remove_workers().

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◆ XrdFfsQueue_worker()

void * XrdFfsQueue_worker ( void * x)

Definition at line 154 of file XrdFfsQueue.cc.

155{
156 struct XrdFfsQueueTasks *task;
157 short quit = 0;
158
159 loop:
160 task = XrdFfsQueue_dequeue();
161
162 if (task->done == -1) // terminate this worker thread
163 quit = 1;
164
165 pthread_mutex_lock(&task->mutex);
166#ifdef QUEDEBUG
167 printf("worker %d on task %d\n", wid, task->id);
168#endif
169 if (!quit)
170 (task->func)(task->args);
171
172 task->done = 1;
173 pthread_cond_signal(&task->cond);
174 pthread_mutex_unlock(&task->mutex);
175 if (quit)
176 {
177#ifdef QUEDEBUG
178 printf("worker %d is leaving\n", wid);
179#endif
180 free(x);
181// pthread_exit(NULL);
182 return(NULL);
183 }
184 else
185 goto loop;
186}
struct XrdFfsQueueTasks * XrdFfsQueue_dequeue()

References XrdFfsQueueTasks::args, XrdFfsQueueTasks::cond, XrdFfsQueueTasks::done, XrdFfsQueueTasks::func, XrdFfsQueueTasks::id, XrdFfsQueueTasks::mutex, and XrdFfsQueue_dequeue().

Referenced by XrdFfsQueue_create_workers().

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Variable Documentation

◆ XrdFfsQueueNext_task_id

unsigned int XrdFfsQueueNext_task_id = 0

Definition at line 41 of file XrdFfsQueue.cc.

Referenced by XrdFfsQueue_enqueue().

◆ XrdFfsQueueNworkers

unsigned short XrdFfsQueueNworkers = 0

◆ XrdFfsQueueTaskque_cond

pthread_cond_t XrdFfsQueueTaskque_cond = PTHREAD_COND_INITIALIZER

Definition at line 43 of file XrdFfsQueue.cc.

Referenced by XrdFfsQueue_dequeue(), and XrdFfsQueue_enqueue().

◆ XrdFfsQueueTaskque_head

struct XrdFfsQueueTasks* XrdFfsQueueTaskque_head = NULL

◆ XrdFfsQueueTaskque_mutex

pthread_mutex_t XrdFfsQueueTaskque_mutex = PTHREAD_MUTEX_INITIALIZER

◆ XrdFfsQueueTaskque_tail

struct XrdFfsQueueTasks* XrdFfsQueueTaskque_tail = NULL

◆ XrdFfsQueueWorker_id

unsigned int XrdFfsQueueWorker_id = 0

Definition at line 190 of file XrdFfsQueue.cc.

Referenced by XrdFfsQueue_create_workers().

◆ XrdFfsQueueWorker_mutex

pthread_mutex_t XrdFfsQueueWorker_mutex