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25 * @brief Dynamic Knobs Initialization for Core.
27 ******************************************************************************/
30 #include <core/knobs.h>
36 // Assume the type is compatible with a 32-bit integer
38 static inline void ConvertEnvToKnob(const char* pOverride
, T
& knobValue
)
41 char* pStopped
= nullptr;
42 value
= strtoul(pOverride
, &pStopped
, 0);
43 if (pStopped
!= pOverride
)
45 knobValue
= static_cast<T
>(value
);
49 static inline void ConvertEnvToKnob(const char* pOverride
, bool& knobValue
)
51 size_t len
= strlen(pOverride
);
54 auto c
= tolower(pOverride
[0]);
55 if (c
== 'y' || c
== 't' || c
== '1')
60 if (c
== 'n' || c
== 'f' || c
== '0')
67 // Try converting to a number and casting to bool
69 char* pStopped
= nullptr;
70 value
= strtoul(pOverride
, &pStopped
, 0);
71 if (pStopped
!= pOverride
)
73 knobValue
= value
!= 0;
77 static inline void ConvertEnvToKnob(const char* pOverride
, float& knobValue
)
79 float value
= knobValue
;
80 if (sscanf(pOverride
, "%f", &value
))
86 static inline void ConvertEnvToKnob(const char* pOverride
, std::string
& knobValue
)
88 knobValue
= pOverride
;
92 static inline void InitKnob(T
& knob
)
95 // TODO, read registry first
97 // Second, read environment variables
98 const char* pOverride
= getenv(knob
.Name());
102 auto knobValue
= knob
.Value();
103 ConvertEnvToKnob(pOverride
, knobValue
);
104 knob
.Value(knobValue
);