Tue Aug 19 16:10:38 CEST 2003
The driver callback call() has a "flags" field which is undocumented.
The erl_driver.h header file includes a define which suggests it's use:
/* Constants for return flags from the 'port_call' callback */
#define DRIVER_CALL_KEEP_BUFFER 0x1
Can anyone provide me some insight about this?
int call(ErlDrvData drv_data, unsigned int command,
char *buf, int len, char **rbuf, int rlen,
unsigned int *flags)
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