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Add VerilatedVcdFile to allow real-time waveforms, bug890.

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This commit is contained in:
Wilson Snyder
2015-03-05 08:54:57 -05:00
parent 751384cb5c
commit a0fd065dcf
7 changed files with 71 additions and 30 deletions
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include/verilated_vcd_c.cpp
+42 -6
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@@ -76,11 +76,48 @@ protected:
: m_initcb(icb), m_fullcb(fcb), m_changecb(changecb), m_userthis(ut), m_code(code) {};
};
//=============================================================================
//=============================================================================
//=============================================================================
// VerilatedVcdFile
bool VerilatedVcdFile::open(const string& name) {
m_fd = ::open(name.c_str(), O_CREAT|O_WRONLY|O_TRUNC|O_LARGEFILE|O_NONBLOCK, 0666);
return (m_fd>=0);
}
void VerilatedVcdFile::close() {
::close(m_fd);
}
ssize_t VerilatedVcdFile::write(const char* bufp, ssize_t len) {
return ::write(m_fd, bufp, len);
}
//=============================================================================
//=============================================================================
//=============================================================================
// Opening/Closing
VerilatedVcd::VerilatedVcd(VerilatedVcdFile* filep)
: m_isOpen(false), m_rolloverMB(0), m_modDepth(0), m_nextCode(1) {
// Not in header to avoid link issue if header is included without this .cpp file
m_fileNewed = (filep == NULL);
m_filep = m_fileNewed ? new VerilatedVcdFile : filep;
m_namemapp = NULL;
m_timeRes = m_timeUnit = 1e-9;
m_timeLastDump = 0;
m_sigs_oldvalp = NULL;
m_evcd = false;
m_scopeEscape = '.'; // Backward compatibility
m_fullDump = true;
m_wrChunkSize = 8*1024;
m_wrBufp = new char [m_wrChunkSize*8];
m_wrFlushp = m_wrBufp + m_wrChunkSize * 6;
m_writep = m_wrBufp;
m_wroteBytes = 0;
}
void VerilatedVcd::open (const char* filename) {
if (isOpen()) return;
@@ -142,9 +179,7 @@ void VerilatedVcd::openNext (bool incFilename) {
assert(0); // Not supported yet.
} else {
// cppcheck-suppress duplicateExpression
m_fd = ::open (m_filename.c_str(), O_CREAT|O_WRONLY|O_TRUNC|O_LARGEFILE|O_NONBLOCK
, 0666);
if (m_fd<0) {
if (!m_filep->open(m_filename)) {
// User code can check isOpen()
m_isOpen = false;
return;
@@ -199,6 +234,7 @@ VerilatedVcd::~VerilatedVcd() {
if (m_wrBufp) { delete[] m_wrBufp; m_wrBufp=NULL; }
if (m_sigs_oldvalp) { delete[] m_sigs_oldvalp; m_sigs_oldvalp=NULL; }
deleteNameMap();
if (m_filep && m_fileNewed) { delete m_filep; m_filep = NULL; }
// Remove from list of traces
vector<VerilatedVcd*>::iterator pos = find(s_vcdVecp.begin(), s_vcdVecp.end(), this);
if (pos != s_vcdVecp.end()) { s_vcdVecp.erase(pos); }
@@ -209,7 +245,7 @@ void VerilatedVcd::closePrev () {
bufferFlush();
m_isOpen = false;
::close(m_fd);
m_filep->close();
}
void VerilatedVcd::closeErr () {
@@ -219,7 +255,7 @@ void VerilatedVcd::closeErr () {
// No buffer flush, just fclose
m_isOpen = false;
::close(m_fd); // May get error, just ignore it
m_filep->close(); // May get error, just ignore it
}
void VerilatedVcd::close() {
@@ -285,7 +321,7 @@ void VerilatedVcd::bufferFlush () {
ssize_t remaining = (m_writep - wp);
if (remaining==0) break;
errno = 0;
ssize_t got = write (m_fd, wp, remaining);
ssize_t got = m_filep->write(wp, remaining);
if (got>0) {
wp += got;
m_wroteBytes += got;