Fix deadlock.

[dcpomatic.git] / src / lib / log.cc

diff --git a/src/lib/log.cc b/src/lib/log.cc
index 4de6bd874e94c4c97feed165a210de7b10169936..efea9f6b55bc704535d07d64d7c7dd48030826c1 100644 (file)
--- a/src/lib/log.cc
+++ b/src/lib/log.cc
@@ -21,11 +21,12 @@
  *  @brief A very simple logging class.
  */
 
-#include <time.h>
-#include <cstdio>
 #include "log.h"
 #include "cross.h"
 #include "config.h"
+#include "safe_stringstream.h"
+#include <time.h>
+#include <cstdio>
 
 #include "i18n.h"
 
@@ -34,7 +35,8 @@ using namespace std;
 int const Log::TYPE_GENERAL = 0x1;
 int const Log::TYPE_WARNING = 0x2;
 int const Log::TYPE_ERROR   = 0x4;
-int const Log::TYPE_TIMING  = 0x8;
+int const Log::TYPE_DEBUG   = 0x8;
+int const Log::TYPE_TIMING  = 0x10;
 
 Log::Log ()
        : _types (0)
@@ -63,7 +65,7 @@ Log::log (string message, int type)
        time (&t);
        string a = ctime (&t);
 
-       stringstream s;
+       SafeStringStream s;
        s << a.substr (0, a.length() - 1) << N_(": ");
 
        if (type & TYPE_ERROR) {
@@ -90,10 +92,26 @@ Log::microsecond_log (string m, int t)
        struct timeval tv;
        gettimeofday (&tv, 0);
 
-       stringstream s;
+       SafeStringStream s;
        s << tv.tv_sec << N_(":") << tv.tv_usec << N_(" ") << m;
        do_log (s.str ());
-}      
+}
+
+void
+Log::dcp_log (dcp::NoteType type, string m)
+{
+       switch (type) {
+       case dcp::DCP_PROGRESS:
+               log (m, TYPE_GENERAL);
+               break;
+       case dcp::DCP_ERROR:
+               log (m, TYPE_ERROR);
+               break;
+       case dcp::DCP_NOTE:
+               log (m, TYPE_WARNING);
+               break;
+       }
+}
 
 void
 Log::set_types (int t)
@@ -122,3 +140,45 @@ FileLog::do_log (string m)
        fclose (f);
 }
 
+string
+FileLog::head_and_tail (int amount) const
+{
+       boost::mutex::scoped_lock lm (_mutex);
+
+       uintmax_t head_amount = amount;
+       uintmax_t tail_amount = amount;
+       uintmax_t size = boost::filesystem::file_size (_file);
+
+       if (size < (head_amount + tail_amount)) {
+               head_amount = size;
+               tail_amount = 0;
+       }
+       
+       FILE* f = fopen_boost (_file, "r");
+       if (!f) {
+               return "";
+       }
+
+       string out;
+
+       char* buffer = new char[max(head_amount, tail_amount) + 1];
+       
+       int N = fread (buffer, 1, head_amount, f);
+       buffer[N] = '\0';
+       out += string (buffer);
+
+       if (tail_amount > 0) {
+               out +=  "\n .\n .\n .\n";
+
+               fseek (f, - tail_amount - 1, SEEK_END);
+               
+               N = fread (buffer, 1, tail_amount, f);
+               buffer[N] = '\0';
+               out += string (buffer) + "\n";
+       }
+
+       delete[] buffer;
+       fclose (f);
+
+       return out;
+}