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/*-------------------------------------------------------------------------
* jit.h
* Provider independent JIT infrastructure.
*
* Copyright (c) 2016-2018, PostgreSQL Global Development Group
*
* src/include/jit/jit.h
*
*-------------------------------------------------------------------------
*/
#ifndef JIT_H
#define JIT_H
#include "executor/instrument.h"
#include "utils/resowner.h"
/* Flags deterimining what kind of JIT operations to perform */
#define PGJIT_NONE 0
#define PGJIT_PERFORM 1 << 0
#define PGJIT_OPT3 1 << 1
/* reserved for PGJIT_INLINE */
#define PGJIT_EXPR 1 << 3
#define PGJIT_DEFORM 1 << 4
typedef struct JitContext
{
/* see PGJIT_* above */
int flags;
ResourceOwner resowner;
/* number of emitted functions */
size_t created_functions;
/* accumulated time to generate code */
instr_time generation_counter;
/* accumulated time for optimization */
instr_time optimization_counter;
/* accumulated time for code emission */
instr_time emission_counter;
} JitContext;
typedef struct JitProviderCallbacks JitProviderCallbacks;
extern void _PG_jit_provider_init(JitProviderCallbacks *cb);
typedef void (*JitProviderInit) (JitProviderCallbacks *cb);
typedef void (*JitProviderResetAfterErrorCB) (void);
typedef void (*JitProviderReleaseContextCB) (JitContext *context);
struct ExprState;
typedef bool (*JitProviderCompileExprCB) (struct ExprState *state);
struct JitProviderCallbacks
{
JitProviderResetAfterErrorCB reset_after_error;
JitProviderReleaseContextCB release_context;
JitProviderCompileExprCB compile_expr;
};
/* GUCs */
extern bool jit_enabled;
extern char *jit_provider;
extern bool jit_debugging_support;
extern bool jit_dump_bitcode;
extern bool jit_expressions;
extern bool jit_profiling_support;
extern bool jit_tuple_deforming;
extern double jit_above_cost;
extern double jit_optimize_above_cost;
extern void jit_reset_after_error(void);
extern void jit_release_context(JitContext *context);
/*
* Functions for attempting to JIT code. Callers must accept that these might
* not be able to perform JIT (i.e. return false).
*/
extern bool jit_compile_expr(struct ExprState *state);
#endif /* JIT_H */
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