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https://git.postgresql.org/git/postgresql.git
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8ec569479f
Up until now, we've had a policy of only marking certain variables in the PostgreSQL header files with PGDLLIMPORT, but now we've decided to mark them all. This means that extensions running on Windows should no longer operate at a disadvantage as compared to extensions running on Linux: if the variable is present in a header file, it should be accessible. Discussion: http://postgr.es/m/CA+TgmoYanc1_FSfimhgiWSqVyP5KKmh5NP2BWNwDhO8Pg2vGYQ@mail.gmail.com
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*-------------------------------------------------------------------------
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* jit.h
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* Provider independent JIT infrastructure.
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*
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* Copyright (c) 2016-2022, PostgreSQL Global Development Group
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*
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* src/include/jit/jit.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef JIT_H
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#define JIT_H
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#include "executor/instrument.h"
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#include "utils/resowner.h"
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/* Flags determining what kind of JIT operations to perform */
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#define PGJIT_NONE 0
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#define PGJIT_PERFORM (1 << 0)
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#define PGJIT_OPT3 (1 << 1)
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#define PGJIT_INLINE (1 << 2)
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#define PGJIT_EXPR (1 << 3)
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#define PGJIT_DEFORM (1 << 4)
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typedef struct JitInstrumentation
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{
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/* number of emitted functions */
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size_t created_functions;
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/* accumulated time to generate code */
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instr_time generation_counter;
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/* accumulated time for inlining */
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instr_time inlining_counter;
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/* accumulated time for optimization */
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instr_time optimization_counter;
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/* accumulated time for code emission */
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instr_time emission_counter;
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} JitInstrumentation;
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/*
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* DSM structure for accumulating jit instrumentation of all workers.
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*/
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typedef struct SharedJitInstrumentation
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{
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int num_workers;
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JitInstrumentation jit_instr[FLEXIBLE_ARRAY_MEMBER];
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} SharedJitInstrumentation;
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typedef struct JitContext
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{
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/* see PGJIT_* above */
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int flags;
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ResourceOwner resowner;
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JitInstrumentation instr;
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} JitContext;
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typedef struct JitProviderCallbacks JitProviderCallbacks;
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extern void _PG_jit_provider_init(JitProviderCallbacks *cb);
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typedef void (*JitProviderInit) (JitProviderCallbacks *cb);
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typedef void (*JitProviderResetAfterErrorCB) (void);
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typedef void (*JitProviderReleaseContextCB) (JitContext *context);
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struct ExprState;
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typedef bool (*JitProviderCompileExprCB) (struct ExprState *state);
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struct JitProviderCallbacks
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{
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JitProviderResetAfterErrorCB reset_after_error;
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JitProviderReleaseContextCB release_context;
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JitProviderCompileExprCB compile_expr;
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};
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/* GUCs */
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extern PGDLLIMPORT bool jit_enabled;
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extern PGDLLIMPORT char *jit_provider;
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extern PGDLLIMPORT bool jit_debugging_support;
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extern PGDLLIMPORT bool jit_dump_bitcode;
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extern PGDLLIMPORT bool jit_expressions;
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extern PGDLLIMPORT bool jit_profiling_support;
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extern PGDLLIMPORT bool jit_tuple_deforming;
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extern PGDLLIMPORT double jit_above_cost;
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extern PGDLLIMPORT double jit_inline_above_cost;
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extern PGDLLIMPORT double jit_optimize_above_cost;
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extern void jit_reset_after_error(void);
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extern void jit_release_context(JitContext *context);
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/*
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* Functions for attempting to JIT code. Callers must accept that these might
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* not be able to perform JIT (i.e. return false).
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*/
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extern bool jit_compile_expr(struct ExprState *state);
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extern void InstrJitAgg(JitInstrumentation *dst, JitInstrumentation *add);
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#endif /* JIT_H */
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