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This is in preparation for defaulting to -fvisibility=hidden in extensions, instead of exporting all symbols. For that symbols intended to be exported need to be tagged with PGDLLEXPORT. Most extensions only need to do so for _PG_init() and functions defined with PG_FUNCTION_INFO_V1. Adding central declarations avoids each extension having to add PGDLLEXPORT. Any existing declarations in extensions will continue to work if fmgr.h is included before them, otherwise compilation for Windows will fail. Author: Andres Freund <andres@anarazel.de> Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/20211101020311.av6hphdl6xbjbuif@alap3.anarazel.de
105 lines
2.8 KiB
C
105 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 PGDLLEXPORT 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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