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Header File Usage Example

  • The log APIs provided in log.h and log.hdr should be used directly; secondary encapsulation is prohibited.
  • Do not pass a null pointer to the log content.
  • If log printing is required, the Hydra source file must include the FILE_ID macro definition for the file name and reference the log header files. For example, the FILE_ID macro definition of fullnat_ovs_hdr needs to be added to the fullnat_ovs.hdr source file.
  • The 0x%x format must be used for printing variables, and the number of variables cannot exceed 4.
  • flexda_sdk/include/dsl/log.hdr: Provides the declarations for DSL code log APIs, supporting log levels ERR, WARN, INFO, and DEBUG.
  • flexda_sdk/include/dfx/log.h: Provides the definitions for DSL code log APIs.

Example

The following takes fullnat_ovs.hdr for example.
#include "logfile_id_user_define.hdr"
#include "log.hdr"

#define FILE_ID fullnat_ovs_hdr

control MyPrePipe(in hdr_fix_headers hdr) {
    ...
    apply {
	   USER_LOG(ERR, "XXX.\n");
	   bit<32> value1 = 1;
           bit<32> value2 = 1;
           
           USER_LOG(WARN, "XXX value1 0x%x value2 0x%x.\n", value1, value2);
          }
    ...
}