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src/hotspot/share/gc/shared/taskqueue.cpp

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rev 56944 : imported patch 8233702-function-to-clamp-value-to-range


  40 #endif
  41 
  42 #if TASKQUEUE_STATS
  43 const char * const TaskQueueStats::_names[last_stat_id] = {
  44   "qpush", "qpop", "qpop-s", "qattempt", "qsteal", "opush", "omax"
  45 };
  46 
  47 TaskQueueStats & TaskQueueStats::operator +=(const TaskQueueStats & addend)
  48 {
  49   for (unsigned int i = 0; i < last_stat_id; ++i) {
  50     _stats[i] += addend._stats[i];
  51   }
  52   return *this;
  53 }
  54 
  55 void TaskQueueStats::print_header(unsigned int line, outputStream* const stream,
  56                                   unsigned int width)
  57 {
  58   // Use a width w: 1 <= w <= max_width
  59   const unsigned int max_width = 40;
  60   const unsigned int w = MAX2(MIN2(width, max_width), 1U);
  61 
  62   if (line == 0) { // spaces equal in width to the header
  63     const unsigned int hdr_width = w * last_stat_id + last_stat_id - 1;
  64     stream->print("%*s", hdr_width, " ");
  65   } else if (line == 1) { // labels
  66     stream->print("%*s", w, _names[0]);
  67     for (unsigned int i = 1; i < last_stat_id; ++i) {
  68       stream->print(" %*s", w, _names[i]);
  69     }
  70   } else if (line == 2) { // dashed lines
  71     char dashes[max_width + 1];
  72     memset(dashes, '-', w);
  73     dashes[w] = '\0';
  74     stream->print("%s", dashes);
  75     for (unsigned int i = 1; i < last_stat_id; ++i) {
  76       stream->print(" %s", dashes);
  77     }
  78   }
  79 }
  80 




  40 #endif
  41 
  42 #if TASKQUEUE_STATS
  43 const char * const TaskQueueStats::_names[last_stat_id] = {
  44   "qpush", "qpop", "qpop-s", "qattempt", "qsteal", "opush", "omax"
  45 };
  46 
  47 TaskQueueStats & TaskQueueStats::operator +=(const TaskQueueStats & addend)
  48 {
  49   for (unsigned int i = 0; i < last_stat_id; ++i) {
  50     _stats[i] += addend._stats[i];
  51   }
  52   return *this;
  53 }
  54 
  55 void TaskQueueStats::print_header(unsigned int line, outputStream* const stream,
  56                                   unsigned int width)
  57 {
  58   // Use a width w: 1 <= w <= max_width
  59   const unsigned int max_width = 40;
  60   const unsigned int w = clamp(width, 1u, max_width);
  61 
  62   if (line == 0) { // spaces equal in width to the header
  63     const unsigned int hdr_width = w * last_stat_id + last_stat_id - 1;
  64     stream->print("%*s", hdr_width, " ");
  65   } else if (line == 1) { // labels
  66     stream->print("%*s", w, _names[0]);
  67     for (unsigned int i = 1; i < last_stat_id; ++i) {
  68       stream->print(" %*s", w, _names[i]);
  69     }
  70   } else if (line == 2) { // dashed lines
  71     char dashes[max_width + 1];
  72     memset(dashes, '-', w);
  73     dashes[w] = '\0';
  74     stream->print("%s", dashes);
  75     for (unsigned int i = 1; i < last_stat_id; ++i) {
  76       stream->print(" %s", dashes);
  77     }
  78   }
  79 }
  80 


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