From: Alexander Schmidt <alex@treefish.org>
Date: Wed, 4 Dec 2013 11:07:06 +0000 (+0100)
Subject: Let outdir be created from rank 0.
X-Git-Url: http://git.treefish.org/~alex/phys/latlib.git/commitdiff_plain/f6dad6a4230bed002b51de0ec8ff34410bac27ec

Let outdir be created from rank 0.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 761a585..0521c1f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ project(latlib)
 
 cmake_minimum_required(VERSION 2.8)
 
-find_package(Boost 1.49 COMPONENTS iostreams REQUIRED)
+find_package(Boost 1.49 COMPONENTS filesystem iostreams REQUIRED)
 include_directories(${Boost_INCLUDE_DIRS}) 
 
 add_library(lat_configcache configcache.cpp)
@@ -19,6 +19,7 @@ target_link_libraries(lat_hypercache lat_configcache lat_writeout)
 add_library(lat_neigh neigh.cpp)
 
 add_library(lat_writeout writeout.cpp)
+target_link_libraries(lat_writeout ${Boost_LIBRARIES})
 
 add_library(lat_paraq paraq.cpp)
 
diff --git a/writeout.cpp b/writeout.cpp
index af67fb5..e10a9d4 100644
--- a/writeout.cpp
+++ b/writeout.cpp
@@ -11,6 +11,8 @@
 #include <errno.h>
 #include <unistd.h>
 
+#include <boost/filesystem.hpp>
+
 using namespace std;
 
 string writeout::tstamp(const long& timestamp)
@@ -53,7 +55,14 @@ writeout::writeout(const string& wdir, const string& _signature,
     sprintf(cRank, "%d", rank);
     fulldir = wdir + "/" + tstamp(timestamp) + "_" + signature + ".tmp";
 
-    mkdir(fulldir.c_str(), 0775);
+    if (rank==0)
+      mkdir(fulldir.c_str(), 0775);
+    else {
+      while ( ! ( boost::filesystem::exists(fulldir) && boost::filesystem::is_directory(fulldir) ) ) {
+	cerr << "WRITOUT: Waiting for rank 0 to create out directory." << endl << flush;
+	sleep(1);
+      }
+    }
 
     logf.open( (fulldir + "/rank" + cRank + ".log").c_str() );