intptr_t
omrfile_write(struct OMRPortLibrary *portLibrary, intptr_t fd, const void *buf, intptr_t nbytes)
{
DWORD nCharsWritten;
intptr_t toWrite, offset = 0;
int32_t errorCode;
HANDLE handle;
Trc_PRT_file_write_Entry(fd, buf, nbytes);
if (OMRPORT_TTY_OUT == fd) {
handle = PPG_tty_consoleOutputHd;
} else if (OMRPORT_TTY_ERR == fd) {
handle = PPG_tty_consoleErrorHd;
} else {
handle = (HANDLE)fd;
}
toWrite = nbytes;
while (nbytes > 0) {
if (toWrite > nbytes) {
toWrite = nbytes;
}
/* The (DWORD)nbytes downcasts can make toWrite smaller than nbytes, however, the while loop
* ensures that nbytes of data is still written */
if (FALSE == WriteFile(handle, (char *)buf + offset, (DWORD)toWrite, &nCharsWritten, NULL)) {
errorCode = GetLastError();
if (ERROR_NOT_ENOUGH_MEMORY == errorCode) {
/*[PR 94924] Use 48K chunks to get around out of memory problem */
if (toWrite > (48 * 1024)) {
toWrite = 48 * 1024;
} else {
toWrite /= 2;
}
/* If we can't write 128 bytes, just return */
if (toWrite >= 128) {
continue;
}
}
errorCode = portLibrary->error_set_last_error(portLibrary, errorCode, findError(errorCode));
Trc_PRT_file_write_Exit(errorCode);
return errorCode;
}
offset += nCharsWritten;
nbytes -= nCharsWritten;
}
Trc_PRT_file_write_Exit(offset);
return offset;
}
/**
* Write to a file.
*
* Writes up to nbytes from the provided buffer to the file referenced by the file descriptor.
*
* @param[in] portLibrary The port library
* @param[in] fd File descriptor to write.
* @param[in] buf Buffer to be written.
* @param[in] nbytes Size of buffer.
*
* @return Number of bytes written on success, portable error return code (which is negative) on failure.
*/
intptr_t
omrfile_write(struct OMRPortLibrary *portLibrary, intptr_t inFD, const void *buf, intptr_t nbytes)
{
int fd = (int)inFD;
intptr_t rc;
Trc_PRT_file_write_Entry(fd, buf, nbytes);
#ifdef AIXPPC
/* Avoid hang on AIX when calling write() with 0 bytes on standard streams. */
if ((0 == nbytes) && ((fd == OMRPORT_TTY_OUT) || (fd == OMRPORT_TTY_ERR))) {
Trc_PRT_file_write_Exit(0);
return 0;
}
#endif
#ifdef J9ZOS390
if (fd == OMRPORT_TTY_OUT) {
rc = fwrite(buf, sizeof(char), nbytes, stdout);
} else if (fd == OMRPORT_TTY_ERR) {
rc = fwrite(buf, sizeof(char), nbytes, stderr);
} else if (fd < FD_BIAS) {
/* Cannot fsync STDIN, and no other FD's should exist <FD_BIAS */
Trc_PRT_file_write_Exit(-1);
return -1;
} else
#elif (FD_BIAS != 0)
#error FD_BIAS must be 0
#endif
{
/* CMVC 178203 - Restart system calls interrupted by EINTR */
do {
/* write will just do the right thing for OMRPORT_TTY_OUT and OMRPORT_TTY_ERR */
rc = write(fd - FD_BIAS, buf, nbytes);
} while ((-1 == rc) && (EINTR == errno));
}
if (rc == -1) {
rc = portLibrary->error_set_last_error(portLibrary, errno, findError(errno));
}
Trc_PRT_file_write_Exit(rc);
return rc;
}