1 files changed, 116 insertions, 0 deletions
diff --git a/src/sat/glucose2/System2.cpp b/src/sat/glucose2/System2.cpp
new file mode 100644
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--- /dev/null
+++ b/src/sat/glucose2/System2.cpp
@@ -0,0 +1,116 @@
+/***************************************************************************************[System.cc]
+Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
+Copyright (c) 2007-2010, Niklas Sorensson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or
+substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**************************************************************************************************/
+
+#include "sat/glucose2/System.h"
+
+#if defined(__linux__)
+
+#include <stdio.h>
+#include <stdlib.h>
+
+ABC_NAMESPACE_IMPL_START
+
+using namespace Gluco2;
+
+// TODO: split the memory reading functions into two: one for reading high-watermark of RSS, and
+// one for reading the current virtual memory size.
+
+static inline int memReadStat(int field)
+{
+    char  name[256];
+    pid_t pid = getpid();
+    int   value;
+
+    sprintf(name, "/proc/%d/statm", pid);
+    FILE* in = fopen(name, "rb");
+    if (in == NULL) return 0;
+
+    for (; field >= 0; field--)
+        if (fscanf(in, "%d", &value) != 1)
+            printf("ERROR! Failed to parse memory statistics from \"/proc\".\n"), exit(1);
+    fclose(in);
+    return value;
+}
+
+
+static inline int memReadPeak(void)
+{
+    char  name[256];
+    pid_t pid = getpid();
+
+    sprintf(name, "/proc/%d/status", pid);
+    FILE* in = fopen(name, "rb");
+    if (in == NULL) return 0;
+
+    // Find the correct line, beginning with "VmPeak:":
+    int peak_kb = 0;
+    while (!feof(in) && fscanf(in, "VmPeak: %d kB", &peak_kb) != 1)
+        while (!feof(in) && fgetc(in) != '\n')
+            ;
+    fclose(in);
+
+    return peak_kb;
+}
+
+double Gluco2::memUsed() { return (double)memReadStat(0) * (double)getpagesize() / (1024*1024); }
+double Gluco2::memUsedPeak() { 
+    double peak = memReadPeak() / 1024;
+    return peak == 0 ? memUsed() : peak; }
+
+ABC_NAMESPACE_IMPL_END
+
+#elif defined(__FreeBSD__)
+
+ABC_NAMESPACE_IMPL_START
+
+using namespace Gluco2;
+
+double Gluco2::memUsed(void) {
+    struct rusage ru;
+    getrusage(RUSAGE_SELF, &ru);
+    return (double)ru.ru_maxrss / 1024; }
+double memUsedPeak(void) { return memUsed(); }
+
+ABC_NAMESPACE_IMPL_END
+
+#elif defined(__APPLE__)
+
+#include <malloc/malloc.h>
+
+ABC_NAMESPACE_IMPL_START
+
+double Gluco2::memUsed(void) {
+    malloc_statistics_t t;
+    malloc_zone_statistics(NULL, &t);
+    return (double)t.max_size_in_use / (1024*1024); }
+
+ABC_NAMESPACE_IMPL_END
+
+#else
+
+ABC_NAMESPACE_IMPL_START
+
+double Gluco2::memUsed() { 
+    return 0; }
+
+ABC_NAMESPACE_IMPL_END
+
+#endif
+