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/*-------------------------------------------------------------------------
* jit.h
* Provider independent JIT infrastructure.
*
* Copyright (c) 2016-2023, PostgreSQL Global Development Group
*
* src/include/jit/jit.h
*
*-------------------------------------------------------------------------
*/
#ifndef JIT_H
#define JIT_H
#include "executor/instrument.h"
#include "utils/resowner.h"
/* Flags determining what kind of JIT operations to perform */
#define PGJIT_NONE 0
#define PGJIT_PERFORM (1 << 0)
#define PGJIT_OPT3 (1 << 1)
#define PGJIT_INLINE (1 << 2)
#define PGJIT_EXPR (1 << 3)
#define PGJIT_DEFORM (1 << 4)
typedef struct JitInstrumentation
{
/* number of emitted functions */
size_t created_functions;
/* accumulated time to generate code */
instr_time generation_counter;
/* accumulated time for inlining */
instr_time inlining_counter;
/* accumulated time for optimization */
instr_time optimization_counter;
/* accumulated time for code emission */
instr_time emission_counter;
} JitInstrumentation;
/*
* DSM structure for accumulating jit instrumentation of all workers.
*/
typedef struct SharedJitInstrumentation
{
int num_workers;
JitInstrumentation jit_instr[FLEXIBLE_ARRAY_MEMBER];
} SharedJitInstrumentation;
typedef struct JitContext
{
/* see PGJIT_* above */
int flags;
ResourceOwner resowner;
JitInstrumentation instr;
} JitContext;
typedef struct JitProviderCallbacks JitProviderCallbacks;
extern PGDLLEXPORT 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 __thread PGDLLIMPORT bool jit_enabled;
extern __thread PGDLLIMPORT char *jit_provider;
extern __thread PGDLLIMPORT bool jit_debugging_support;
extern __thread PGDLLIMPORT bool jit_dump_bitcode;
extern __thread PGDLLIMPORT bool jit_expressions;
extern __thread PGDLLIMPORT bool jit_profiling_support;
extern __thread PGDLLIMPORT bool jit_tuple_deforming;
extern __thread PGDLLIMPORT double jit_above_cost;
extern __thread PGDLLIMPORT double jit_inline_above_cost;
extern __thread PGDLLIMPORT 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);
extern void InstrJitAgg(JitInstrumentation *dst, JitInstrumentation *add);
#endif /* JIT_H */
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